diff --git a/src/dialog/vdeletenotebookdialog.cpp b/src/dialog/vdeletenotebookdialog.cpp
index 483d0100..4fba5f30 100644
--- a/src/dialog/vdeletenotebookdialog.cpp
+++ b/src/dialog/vdeletenotebookdialog.cpp
@@ -1,5 +1,8 @@
 #include <QtWidgets>
 #include "vdeletenotebookdialog.h"
+#include "vconfigmanager.h"
+
+extern VConfigManager vconfig;
 
 VDeleteNotebookDialog::VDeleteNotebookDialog(const QString &p_title, const QString &p_name,
                                              const QString &p_path, QWidget *p_parent)
@@ -10,21 +13,26 @@ VDeleteNotebookDialog::VDeleteNotebookDialog(const QString &p_title, const QStri
 
 void VDeleteNotebookDialog::setupUI(const QString &p_title, const QString &p_name)
 {
-    QLabel *infoLabel = new QLabel(tr("Are you sure to delete notebook: %1 ?").arg(p_name));
+    QLabel *infoLabel = new QLabel(tr("Are you sure to delete notebook <span style=\"%1\">%2</span>?")
+                                     .arg(vconfig.c_dataTextStyle).arg(p_name));
     m_warningLabel = new QLabel();
+    m_warningLabel->setWordWrap(true);
 
     m_notDeleteCheck = new QCheckBox(tr("Do not delete files from disk."), this);
-    m_notDeleteCheck->setChecked(false);
+    m_notDeleteCheck->setChecked(true);
     m_notDeleteCheck->setToolTip(tr("When checked, VNote just removes the notebook instead of deleting files from disk"));
     connect(m_notDeleteCheck, &QCheckBox::stateChanged, this, &VDeleteNotebookDialog::notDeleteCheckChanged);
 
-    notDeleteCheckChanged(false);
+    notDeleteCheckChanged(true);
 
     // Ok is the default button.
     m_btnBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     connect(m_btnBox, &QDialogButtonBox::accepted, this, &QDialog::accept);
     connect(m_btnBox, &QDialogButtonBox::rejected, this, &QDialog::reject);
 
+    QPushButton *okBtn = m_btnBox->button(QDialogButtonBox::Ok);
+    okBtn->setProperty("DangerBtn", true);
+
     // Standard Warning icon.
     QLabel *iconLabel = new QLabel();
     QPixmap pixmap = standardIcon(QMessageBox::Warning);
@@ -41,8 +49,8 @@ void VDeleteNotebookDialog::setupUI(const QString &p_title, const QString &p_nam
 
     QVBoxLayout *infoLayout = new QVBoxLayout();
     infoLayout->addWidget(infoLabel);
-    infoLayout->addWidget(m_warningLabel);
     infoLayout->addWidget(m_notDeleteCheck);
+    infoLayout->addWidget(m_warningLabel);
 
     QHBoxLayout *topLayout = new QHBoxLayout();
     topLayout->addLayout(iconLayout);
@@ -99,8 +107,12 @@ QPixmap VDeleteNotebookDialog::standardIcon(QMessageBox::Icon p_icon)
 void VDeleteNotebookDialog::notDeleteCheckChanged(int p_state)
 {
     if (p_state) {
-        m_warningLabel->setText(tr("VNote won't delete files under this directory: %1 .").arg(m_path));
+        m_warningLabel->setText(tr("VNote won't delete files under directory <span style=\"%1\">%2</span>.")
+                                  .arg(vconfig.c_dataTextStyle).arg(m_path));
     } else {
-        m_warningLabel->setText(tr("This will delete any files under this directory: %1 !").arg(m_path));
+        m_warningLabel->setText(tr("<span style=\"%1\">WARNING</span>: "
+                                   "VNote will delete <b>ANY</b> files under directory <span style=\"%2\">%3</span>! "
+                                   "It may be UNRECOVERABLE!")
+                                  .arg(vconfig.c_warningTextStyle).arg(vconfig.c_dataTextStyle).arg(m_path));
     }
 }
diff --git a/src/dialog/vnewnotebookdialog.cpp b/src/dialog/vnewnotebookdialog.cpp
index c01e8206..fb0f0154 100644
--- a/src/dialog/vnewnotebookdialog.cpp
+++ b/src/dialog/vnewnotebookdialog.cpp
@@ -1,6 +1,9 @@
 #include <QtWidgets>
 #include <QDir>
 #include "vnewnotebookdialog.h"
+#include "vconfigmanager.h"
+
+extern VConfigManager vconfig;
 
 VNewNotebookDialog::VNewNotebookDialog(const QString &title, const QString &info,
                                        const QString &defaultName, const QString &defaultPath,
@@ -11,7 +14,7 @@ VNewNotebookDialog::VNewNotebookDialog(const QString &title, const QString &info
     setupUI();
 
     connect(nameEdit, &QLineEdit::textChanged, this, &VNewNotebookDialog::enableOkButton);
-    connect(pathEdit, &QLineEdit::textChanged, this, &VNewNotebookDialog::enableOkButton);
+    connect(pathEdit, &QLineEdit::textChanged, this, &VNewNotebookDialog::handlePathChanged);
     connect(browseBtn, &QPushButton::clicked, this, &VNewNotebookDialog::handleBrowseBtnClicked);
 
     enableOkButton();
@@ -21,17 +24,18 @@ void VNewNotebookDialog::setupUI()
 {
     if (!info.isEmpty()) {
         infoLabel = new QLabel(info);
+        infoLabel->setWordWrap(true);
     }
     nameLabel = new QLabel(tr("Notebook &name:"));
     nameEdit = new QLineEdit(defaultName);
     nameLabel->setBuddy(nameEdit);
 
-    QLabel *pathLabel = new QLabel(tr("Notebook &path:"));
+    QLabel *pathLabel = new QLabel(tr("Notebook &root folder:"));
     pathEdit = new QLineEdit(defaultPath);
     pathLabel->setBuddy(pathEdit);
     browseBtn = new QPushButton(tr("&Browse"));
 
-    importCheck = new QCheckBox(tr("Import existing notebook"), this);
+    importCheck = new QCheckBox(tr("Try to import existing notebook"), this);
     importCheck->setChecked(true);
     importCheck->setToolTip(tr("When checked, VNote won't create a new config file if there already exists one"));
 
@@ -48,11 +52,21 @@ void VNewNotebookDialog::setupUI()
     connect(m_btnBox, &QDialogButtonBox::accepted, this, &QDialog::accept);
     connect(m_btnBox, &QDialogButtonBox::rejected, this, &QDialog::reject);
 
+    // Warning label.
+    m_warnLabel = new QLabel(tr("<span style=\"%1\">WARNING</span>: The folder you choose is NOT empty! "
+                                "It is highly recommended to use an EMPTY and EXCLUSIVE folder for a notebook. "
+                                "Ignore this warning if you do want to import an existing VNote notebook folder.")
+                               .arg(vconfig.c_warningTextStyle),
+                             this);
+    m_warnLabel->setWordWrap(true);
+    m_warnLabel->hide();
+
     QVBoxLayout *mainLayout = new QVBoxLayout();
     if (infoLabel) {
         mainLayout->addWidget(infoLabel);
     }
     mainLayout->addLayout(topLayout);
+    mainLayout->addWidget(m_warnLabel);
     mainLayout->addWidget(m_btnBox);
     setLayout(mainLayout);
     mainLayout->setSizeConstraint(QLayout::SetFixedSize);
@@ -62,7 +76,9 @@ void VNewNotebookDialog::setupUI()
 void VNewNotebookDialog::enableOkButton()
 {
     QPushButton *okBtn = m_btnBox->button(QDialogButtonBox::Ok);
-    okBtn->setEnabled(!pathEdit->text().isEmpty() && !nameEdit->text().isEmpty());
+    okBtn->setEnabled(!pathEdit->text().isEmpty()
+                      && !nameEdit->text().isEmpty()
+                      && QDir(pathEdit->text()).exists());
 }
 
 QString VNewNotebookDialog::getNameInput() const
@@ -77,7 +93,7 @@ QString VNewNotebookDialog::getPathInput() const
 
 void VNewNotebookDialog::handleBrowseBtnClicked()
 {
-    QString dirPath = QFileDialog::getExistingDirectory(this, tr("Select A Directory For The Notebook"),
+    QString dirPath = QFileDialog::getExistingDirectory(this, tr("Select Root Folder Of The Notebook"),
                                                         QDir::homePath(), QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks);
     pathEdit->setText(dirPath);
 }
@@ -92,3 +108,19 @@ void VNewNotebookDialog::showEvent(QShowEvent *event)
     nameEdit->setFocus();
     QDialog::showEvent(event);
 }
+
+void VNewNotebookDialog::handlePathChanged(const QString &p_text)
+{
+    if (!p_text.isEmpty()) {
+        QDir dir(p_text);
+        QStringList files = dir.entryList(QDir::NoDotAndDotDot | QDir::AllEntries | QDir::Hidden);
+        if (dir.exists() && !files.isEmpty()) {
+            m_warnLabel->show();
+        } else {
+            m_warnLabel->hide();
+        }
+    } else {
+        m_warnLabel->hide();
+    }
+    enableOkButton();
+}
diff --git a/src/dialog/vnewnotebookdialog.h b/src/dialog/vnewnotebookdialog.h
index 11d4c6a4..06118cd9 100644
--- a/src/dialog/vnewnotebookdialog.h
+++ b/src/dialog/vnewnotebookdialog.h
@@ -23,6 +23,7 @@ public:
 private slots:
     void enableOkButton();
     void handleBrowseBtnClicked();
+    void handlePathChanged(const QString &p_text);
 
 protected:
     void showEvent(QShowEvent *event) Q_DECL_OVERRIDE;
@@ -37,6 +38,7 @@ private:
     QCheckBox *importCheck;
     QPushButton *browseBtn;
     QDialogButtonBox *m_btnBox;
+    QLabel *m_warnLabel;
 
     QString title;
     QString info;
diff --git a/src/resources/vnote.qss b/src/resources/vnote.qss
index 043f31b9..75cb0a16 100644
--- a/src/resources/vnote.qss
+++ b/src/resources/vnote.qss
@@ -63,6 +63,18 @@ QPushButton[TitleBtn="true"]::focus {
     background-color: @focus-color;
 }
 
+QPushButton[DangerBtn="true"] {
+    color: #fff;
+    border-color: #d43f3a;
+    background-color: #d9534f;
+}
+
+QPushButton[DangerBtn="true"]::hover {
+    color: #fff;
+    border-color: #ac2925;
+    background-color: #c9302c;
+}
+
 QToolBar {
     border: none;
 }
diff --git a/src/utils/vutils.cpp b/src/utils/vutils.cpp
index 5c8100f5..8d41e500 100644
--- a/src/utils/vutils.cpp
+++ b/src/utils/vutils.cpp
@@ -15,6 +15,7 @@
 #include <QScreen>
 #include <cmath>
 #include <QLocale>
+#include <QPushButton>
 
 #include "vconfigmanager.h"
 
@@ -265,11 +266,19 @@ bool VUtils::copyDirectory(const QString &p_srcDirPath, const QString &p_destDir
 }
 
 int VUtils::showMessage(QMessageBox::Icon p_icon, const QString &p_title, const QString &p_text, const QString &p_infoText,
-                        QMessageBox::StandardButtons p_buttons, QMessageBox::StandardButton p_defaultBtn, QWidget *p_parent)
+                        QMessageBox::StandardButtons p_buttons, QMessageBox::StandardButton p_defaultBtn, QWidget *p_parent,
+                        MessageBoxType p_type)
 {
     QMessageBox msgBox(p_icon, p_title, p_text, p_buttons, p_parent);
     msgBox.setInformativeText(p_infoText);
     msgBox.setDefaultButton(p_defaultBtn);
+
+    if (p_type == MessageBoxType::Danger) {
+        QPushButton *okBtn = dynamic_cast<QPushButton *>(msgBox.button(QMessageBox::Ok));
+        if (okBtn) {
+            okBtn->setStyleSheet(vconfig.c_dangerBtnStyle);
+        }
+    }
     return msgBox.exec();
 }
 
diff --git a/src/utils/vutils.h b/src/utils/vutils.h
index 0b80f79d..eee69e1c 100644
--- a/src/utils/vutils.h
+++ b/src/utils/vutils.h
@@ -16,6 +16,12 @@ class QKeyEvent;
     #define V_ASSERT(cond) ((!(cond)) ? qt_assert(#cond, __FILE__, __LINE__) : qt_noop())
 #endif
 
+enum class MessageBoxType
+{
+    Normal = 0,
+    Danger = 1
+};
+
 class VUtils
 {
 public:
@@ -41,7 +47,8 @@ public:
     static bool copyDirectory(const QString &p_srcDirPath, const QString &p_destDirPath, bool p_isCut);
     static int showMessage(QMessageBox::Icon p_icon, const QString &p_title, const QString &p_text,
                            const QString &p_infoText, QMessageBox::StandardButtons p_buttons,
-                           QMessageBox::StandardButton p_defaultBtn, QWidget *p_parent);
+                           QMessageBox::StandardButton p_defaultBtn, QWidget *p_parent,
+                           MessageBoxType p_type = MessageBoxType::Normal);
     static const QVector<QPair<QString, QString> > &getAvailableLanguages();
     static bool isValidLanguage(const QString &p_lang);
     static bool isImageURL(const QUrl &p_url);
diff --git a/src/vconfigmanager.cpp b/src/vconfigmanager.cpp
index 2338225a..119feecf 100644
--- a/src/vconfigmanager.cpp
+++ b/src/vconfigmanager.cpp
@@ -21,6 +21,10 @@ const QString VConfigManager::c_defaultCssFile = QString(":/resources/styles/def
 const QString VConfigManager::c_defaultMdhlFile = QString(":/resources/styles/default.mdhl");
 const QString VConfigManager::c_solarizedDarkMdhlFile = QString(":/resources/styles/solarized-dark.mdhl");
 const QString VConfigManager::c_solarizedLightMdhlFile = QString(":/resources/styles/solarized-light.mdhl");
+const QString VConfigManager::c_warningTextStyle = QString("color: red; font: bold");
+const QString VConfigManager::c_dataTextStyle = QString("font: bold");
+const QString VConfigManager::c_dangerBtnStyle = QString("QPushButton {color: #fff; border-color: #d43f3a; background-color: #d9534f;}"
+                                                         "QPushButton::hover {color: #fff; border-color: #ac2925; background-color: #c9302c;}");
 
 VConfigManager::VConfigManager()
     : userSettings(NULL), defaultSettings(NULL)
diff --git a/src/vconfigmanager.h b/src/vconfigmanager.h
index 6f13728b..4255836a 100644
--- a/src/vconfigmanager.h
+++ b/src/vconfigmanager.h
@@ -44,6 +44,15 @@ public:
     static const QString appName;
     static const QString c_version;
 
+    // CSS style for Warning texts.
+    static const QString c_warningTextStyle;
+
+    // CSS style for data in label.
+    static const QString c_dataTextStyle;
+
+    // QStylesheet for danger button. Should keep identical with DangerBtn in QSS.
+    static const QString c_dangerBtnStyle;
+
     inline QFont getMdEditFont() const;
 
     inline QPalette getMdEditPalette() const;
diff --git a/src/vdirectorytree.cpp b/src/vdirectorytree.cpp
index 941098cc..09d292a1 100644
--- a/src/vdirectorytree.cpp
+++ b/src/vdirectorytree.cpp
@@ -7,7 +7,9 @@
 #include "vdirectory.h"
 #include "utils/vutils.h"
 #include "veditarea.h"
+#include "vconfigmanager.h"
 
+extern VConfigManager vconfig;
 extern VNote *g_vnote;
 
 VDirectoryTree::VDirectoryTree(VNote *vnote, QWidget *parent)
@@ -95,7 +97,8 @@ void VDirectoryTree::setNotebook(VNotebook *p_notebook)
     }
     if (!m_notebook->open()) {
         VUtils::showMessage(QMessageBox::Warning, tr("Warning"),
-                            tr("Fail to open notebook %1.").arg(m_notebook->getName()), "",
+                            tr("Fail to open notebook <span style=\"%1\">%2</span>.")
+                              .arg(vconfig.c_dataTextStyle).arg(m_notebook->getName()), "",
                             QMessageBox::Ok, QMessageBox::Ok, this);
         clear();
         return;
@@ -138,7 +141,8 @@ void VDirectoryTree::updateDirectoryTreeOne(QTreeWidgetItem *p_parent, int depth
     VDirectory *dir = getVDirectory(p_parent);
     if (!dir->open()) {
         VUtils::showMessage(QMessageBox::Warning, tr("Warning"),
-                            tr("Fail to open directory %1.").arg(dir->getName()), "",
+                            tr("Fail to open directory <span style=\"%1\">%2</span>.")
+                              .arg(vconfig.c_dataTextStyle).arg(dir->getName()), "",
                             QMessageBox::Ok, QMessageBox::Ok, this);
         return;
     }
@@ -300,7 +304,8 @@ void VDirectoryTree::newSubDirectory()
     }
     VDirectory *curDir = getVDirectory(curItem);
 
-    QString info = tr("Create sub-directory under %1.").arg(curDir->getName());
+    QString info = tr("Create sub-directory under <span style=\"%1\">%2</span>.")
+                     .arg(vconfig.c_dataTextStyle).arg(curDir->getName());
     QString text(tr("Directory &name:"));
     QString defaultText("new_directory");
 
@@ -309,14 +314,16 @@ void VDirectoryTree::newSubDirectory()
         if (dialog.exec() == QDialog::Accepted) {
             QString name = dialog.getNameInput();
             if (curDir->findSubDirectory(name)) {
-                info = tr("Name already exists under %1. Please choose another name.").arg(curDir->getName());
+                info = tr("Name already exists under <span style=\"%1\">%2</span>. Please choose another name.")
+                         .arg(vconfig.c_dataTextStyle).arg(curDir->getName());
                 defaultText = name;
                 continue;
             }
             VDirectory *subDir = curDir->createSubDirectory(name);
             if (!subDir) {
                 VUtils::showMessage(QMessageBox::Warning, tr("Warning"),
-                                    tr("Fail to create directory %1.").arg(name), "",
+                                    tr("Fail to create directory <span style=\"%1\">%2</span>.")
+                                      .arg(vconfig.c_dataTextStyle).arg(name), "",
                                     QMessageBox::Ok, QMessageBox::Ok, this);
                 return;
             }
@@ -332,7 +339,8 @@ void VDirectoryTree::newRootDirectory()
     if (!m_notebook) {
         return;
     }
-    QString info = tr("Create root directory in notebook %1.").arg(m_notebook->getName());
+    QString info = tr("Create root directory in notebook <span style=\"%1\">%2</span>.")
+                     .arg(vconfig.c_dataTextStyle).arg(m_notebook->getName());
     QString text(tr("Directory &name:"));
     QString defaultText("new_directory");
     VDirectory *rootDir = m_notebook->getRootDir();
@@ -341,14 +349,16 @@ void VDirectoryTree::newRootDirectory()
         if (dialog.exec() == QDialog::Accepted) {
             QString name = dialog.getNameInput();
             if (rootDir->findSubDirectory(name)) {
-                info = tr("Name already exists in notebook %1. Please choose another name.").arg(m_notebook->getName());
+                info = tr("Name already exists in notebook <span style=\"%1\">%2</span>. Please choose another name.")
+                         .arg(vconfig.c_dataTextStyle).arg(m_notebook->getName());
                 defaultText = name;
                 continue;
             }
             VDirectory *subDir = rootDir->createSubDirectory(name);
             if (!subDir) {
                 VUtils::showMessage(QMessageBox::Warning, tr("Warning"),
-                                    tr("Fail to create directory %1.").arg(name), "",
+                                    tr("Fail to create directory <span style=\"%1\">%2</span>.")
+                                      .arg(vconfig.c_dataTextStyle).arg(name), "",
                                     QMessageBox::Ok, QMessageBox::Ok, this);
                 return;
             }
@@ -367,9 +377,15 @@ void VDirectoryTree::deleteDirectory()
     }
     VDirectory *curDir = getVDirectory(curItem);
     int ret = VUtils::showMessage(QMessageBox::Warning, tr("Warning"),
-                                  tr("Are you sure to delete directory %1?").arg(curDir->getName()),
-                                  tr("This will delete any files under this directory."), QMessageBox::Ok | QMessageBox::Cancel,
-                                  QMessageBox::Ok, this);
+                                  tr("Are you sure to delete directory <span style=\"%1\">%2</span>?")
+                                    .arg(vconfig.c_dataTextStyle).arg(curDir->getName()),
+                                  tr("<span style=\"%1\">WARNING</span>: "
+                                     "VNote will delete the whole directory (<b>ANY</b> files) "
+                                     "<span style=\"%2\">%3</span>."
+                                     "<br>It may be UNRECOVERABLE!")
+                                    .arg(vconfig.c_warningTextStyle).arg(vconfig.c_dataTextStyle).arg(curDir->retrivePath()),
+                                  QMessageBox::Ok | QMessageBox::Cancel,
+                                  QMessageBox::Ok, this, MessageBoxType::Danger);
     if (ret == QMessageBox::Ok) {
         m_editArea->closeFile(curDir, true);
         VDirectory *parentDir = curDir->getParentDirectory();
@@ -415,7 +431,8 @@ void VDirectoryTree::editDirectoryInfo()
             }
             if (!curDir->rename(name)) {
                 VUtils::showMessage(QMessageBox::Warning, tr("Warning"),
-                                    tr("Fail to rename directory %1.").arg(curName), "",
+                                    tr("Fail to rename directory <span style=\"%1\">%2</span>.")
+                                      .arg(vconfig.c_dataTextStyle).arg(curName), "",
                                     QMessageBox::Ok, QMessageBox::Ok, this);
                 return;
             }
@@ -593,7 +610,8 @@ bool VDirectoryTree::copyDirectory(VDirectory *p_destDir, const QString &p_destN
         emit directoryUpdated(destDir);
     } else {
         VUtils::showMessage(QMessageBox::Warning, tr("Warning"),
-                            tr("Fail to copy directory %1.").arg(srcName),
+                            tr("Fail to copy directory <span style=\"%1\">%2</span>.")
+                              .arg(vconfig.c_dataTextStyle).arg(srcName),
                             tr("Please check if there already exists a directory with the same name."),
                             QMessageBox::Ok, QMessageBox::Ok, this);
     }
diff --git a/src/vedittab.cpp b/src/vedittab.cpp
index ae95fc01..1a97c380 100644
--- a/src/vedittab.cpp
+++ b/src/vedittab.cpp
@@ -223,7 +223,8 @@ void VEditTab::readFile()
     if (m_textEditor && m_textEditor->isModified()) {
         // Prompt to save the changes
         int ret = VUtils::showMessage(QMessageBox::Information, tr("Information"),
-                                      tr("Note %1 has been modified.").arg(m_file->getName()),
+                                      tr("Note <span style=\"%1\">%2</span> has been modified.")
+                                        .arg(vconfig.c_dataTextStyle).arg(m_file->getName()),
                                       tr("Do you want to save your changes?"),
                                       QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel,
                                       QMessageBox::Save, this);
@@ -263,7 +264,8 @@ bool VEditTab::saveFile()
     if (!QFile(filePath).exists()) {
         qWarning() << filePath << "being written has been removed";
         VUtils::showMessage(QMessageBox::Warning, tr("Warning"), tr("Fail to save note."),
-                            tr("%1 being written has been removed.").arg(filePath),
+                            tr("File <span style=\"%1\">%2</span> being written has been removed.")
+                              .arg(vconfig.c_dataTextStyle).arg(filePath),
                             QMessageBox::Ok, QMessageBox::Ok, this);
         return false;
     }
diff --git a/src/vfilelist.cpp b/src/vfilelist.cpp
index 26d52405..d4a0f31f 100644
--- a/src/vfilelist.cpp
+++ b/src/vfilelist.cpp
@@ -8,7 +8,9 @@
 #include "veditarea.h"
 #include "utils/vutils.h"
 #include "vfile.h"
+#include "vconfigmanager.h"
 
+extern VConfigManager vconfig;
 extern VNote *g_vnote;
 
 VFileList::VFileList(QWidget *parent)
@@ -175,8 +177,9 @@ void VFileList::newFile()
     if (!m_directory) {
         return;
     }
-    QString info = tr("Create a note in %1.").arg(m_directory->getName());
-    info = info + "\n" + tr("Note with name ending with \".md\" will be treated as Markdown type.");
+    QString info = tr("Create a note in <span style=\"%1\">%2</span>.")
+                     .arg(vconfig.c_dataTextStyle).arg(m_directory->getName());
+    info = info + "<br>" + tr("Note with name ending with \".md\" will be treated as Markdown type.");
     QString text(tr("Note &name:"));
     QString defaultText("new_note.md");
     do {
@@ -191,7 +194,8 @@ void VFileList::newFile()
             VFile *file = m_directory->createFile(name);
             if (!file) {
                 VUtils::showMessage(QMessageBox::Warning, tr("Warning"),
-                                    tr("Fail to create note %1.").arg(name), "",
+                                    tr("Fail to create note <span style=\"%1\">%2</span>.")
+                                      .arg(vconfig.c_dataTextStyle).arg(name), "",
                                     QMessageBox::Ok, QMessageBox::Ok, this);
                 return;
             }
@@ -248,10 +252,13 @@ void VFileList::deleteFile(VFile *p_file)
     VDirectory *dir = p_file->getDirectory();
     QString fileName = p_file->getName();
     int ret = VUtils::showMessage(QMessageBox::Warning, tr("Warning"),
-                                  tr("Are you sure to delete note %1?").arg(fileName),
-                                  tr("This may be unrecoverable!"),
+                                  tr("Are you sure to delete note <span style=\"%1\">%2</span>?")
+                                    .arg(vconfig.c_dataTextStyle).arg(fileName),
+                                  tr("<span style=\"%1\">WARNING</span>: The files (including images) "
+                                     "deleted may be UNRECOVERABLE!")
+                                    .arg(vconfig.c_warningTextStyle),
                                   QMessageBox::Ok | QMessageBox::Cancel,
-                                  QMessageBox::Ok, this);
+                                  QMessageBox::Ok, this, MessageBoxType::Danger);
     if (ret == QMessageBox::Ok) {
         editArea->closeFile(p_file, true);
 
@@ -417,7 +424,8 @@ void VFileList::pasteFiles(VDirectory *p_destDir)
             nrPasted++;
         } else {
             VUtils::showMessage(QMessageBox::Warning, tr("Warning"),
-                                tr("Fail to copy note %1.").arg(srcFile->getName()),
+                                tr("Fail to copy note <span style=\"%1\">%2</span>.")
+                                  .arg(vconfig.c_dataTextStyle).arg(srcFile->getName()),
                                 tr("Please check if there already exists a file with the same name in the target directory."),
                                 QMessageBox::Ok, QMessageBox::Ok, this);
         }
@@ -442,7 +450,8 @@ bool VFileList::copyFile(VDirectory *p_destDir, const QString &p_destName, VFile
         if (editArea->isFileOpened(p_file)) {
             int ret = VUtils::showMessage(QMessageBox::Warning, tr("Warning"),
                                           tr("The renaming will change the note type."),
-                                          tr("You should close the note %1 before continue.").arg(p_file->getName()),
+                                          tr("You should close the note <span style=\"%1\">%2</span> before continue.")
+                                            .arg(vconfig.c_dataTextStyle).arg(p_file->getName()),
                                           QMessageBox::Ok | QMessageBox::Cancel, QMessageBox::Ok, this);
             if (QMessageBox::Ok == ret) {
                 if (!editArea->closeFile(p_file, false)) {
diff --git a/src/vmainwindow.cpp b/src/vmainwindow.cpp
index 79445c89..ca4d1292 100644
--- a/src/vmainwindow.cpp
+++ b/src/vmainwindow.cpp
@@ -634,7 +634,7 @@ void VMainWindow::importNoteFromFile()
 {
     static QString lastPath = QDir::homePath();
     QStringList files = QFileDialog::getOpenFileNames(this,
-                                                      tr("Select Files(HTML or Markdown) To Import"),
+                                                      tr("Select Files (HTML or Markdown) To Import"),
                                                       lastPath);
     if (files.isEmpty()) {
         return;
diff --git a/src/vnotebookselector.cpp b/src/vnotebookselector.cpp
index bb8f3833..3a80ce1f 100644
--- a/src/vnotebookselector.cpp
+++ b/src/vnotebookselector.cpp
@@ -160,7 +160,10 @@ void VNotebookSelector::update()
 
 bool VNotebookSelector::newNotebook()
 {
-    QString info;
+    QString info(tr("Please type the name of the notebook and "
+                    "choose an existing directory as Root Folder of the notebook.\n"
+                    "The root folder should be used EXCLUSIVELY by VNote and "
+                    "it is recommended to be EMPTY."));
     QString defaultName("new_notebook");
     QString defaultPath;