diff --git a/nw/gui/doceditor.py b/nw/gui/doceditor.py
index d4cf17a9..cba62c16 100644
--- a/nw/gui/doceditor.py
+++ b/nw/gui/doceditor.py
@@ -1414,6 +1414,7 @@ class GuiDocEditSearch(QFrame):
         self.showReplace = QToolButton(self)
         self.showReplace.setArrowType(Qt.RightArrow)
         self.showReplace.setCheckable(True)
+        self.showReplace.setToolTip("Show/hide the replace text box")
         self.showReplace.setStyleSheet(r"QToolButton {border: none; background: transparent;}")
         self.showReplace.toggled.connect(self._doToggleReplace)
 
@@ -1700,6 +1701,7 @@ class GuiDocEditHeader(QWidget):
         self.minmaxButton.setStyleSheet(buttonStyle)
         self.minmaxButton.setToolButtonStyle(Qt.ToolButtonIconOnly)
         self.minmaxButton.setVisible(False)
+        self.minmaxButton.setToolTip("Toggle Focus Mode")
         self.minmaxButton.clicked.connect(self._minmaxDocument)
 
         self.closeButton = QToolButton(self)
@@ -1710,6 +1712,7 @@ class GuiDocEditHeader(QWidget):
         self.closeButton.setStyleSheet(buttonStyle)
         self.closeButton.setToolButtonStyle(Qt.ToolButtonIconOnly)
         self.closeButton.setVisible(False)
+        self.closeButton.setToolTip("Close the document")
         self.closeButton.clicked.connect(self._closeDocument)
 
         # Assemble Layout
diff --git a/nw/gui/docviewer.py b/nw/gui/docviewer.py
index 79188846..f20d9082 100644
--- a/nw/gui/docviewer.py
+++ b/nw/gui/docviewer.py
@@ -449,16 +449,6 @@ class GuiDocViewHeader(QWidget):
         ).format(*self.theTheme.colText)
 
         # Buttons
-        self.closeButton = QToolButton(self)
-        self.closeButton.setIcon(self.theTheme.getIcon("close"))
-        self.closeButton.setContentsMargins(0, 0, 0, 0)
-        self.closeButton.setIconSize(QSize(fPx, fPx))
-        self.closeButton.setFixedSize(fPx, fPx)
-        self.closeButton.setStyleSheet(buttonStyle)
-        self.closeButton.setToolButtonStyle(Qt.ToolButtonIconOnly)
-        self.closeButton.setVisible(False)
-        self.closeButton.clicked.connect(self._closeDocument)
-
         self.refreshButton = QToolButton(self)
         self.refreshButton.setIcon(self.theTheme.getIcon("refresh"))
         self.refreshButton.setContentsMargins(0, 0, 0, 0)
@@ -467,8 +457,20 @@ class GuiDocViewHeader(QWidget):
         self.refreshButton.setStyleSheet(buttonStyle)
         self.refreshButton.setToolButtonStyle(Qt.ToolButtonIconOnly)
         self.refreshButton.setVisible(False)
+        self.refreshButton.setToolTip("Reload the document")
         self.refreshButton.clicked.connect(self._refreshDocument)
 
+        self.closeButton = QToolButton(self)
+        self.closeButton.setIcon(self.theTheme.getIcon("close"))
+        self.closeButton.setContentsMargins(0, 0, 0, 0)
+        self.closeButton.setIconSize(QSize(fPx, fPx))
+        self.closeButton.setFixedSize(fPx, fPx)
+        self.closeButton.setStyleSheet(buttonStyle)
+        self.closeButton.setToolButtonStyle(Qt.ToolButtonIconOnly)
+        self.closeButton.setVisible(False)
+        self.closeButton.setToolTip("Close the document")
+        self.closeButton.clicked.connect(self._closeDocument)
+
         # Assemble Layout
         self.outerBox = QHBoxLayout()
         self.outerBox.setSpacing(hSp)
@@ -593,6 +595,7 @@ class GuiDocViewFooter(QWidget):
         self.showHide.setIconSize(QSize(fPx, fPx))
         self.showHide.setFixedSize(QSize(fPx, fPx))
         self.showHide.clicked.connect(self._doShowHide)
+        self.showHide.setToolTip("Show/hide the reference panel")
 
         # Sticky Button
         stickyOn  = self.theTheme.getPixmap("sticky-on", (fPx, fPx))
@@ -608,6 +611,9 @@ class GuiDocViewFooter(QWidget):
         self.stickyRefs.setIconSize(QSize(fPx, fPx))
         self.stickyRefs.setFixedSize(QSize(fPx, fPx))
         self.stickyRefs.toggled.connect(self._doToggleSticky)
+        self.stickyRefs.setToolTip(
+            "Activate to freeze the content of the references panel when changing document"
+        )
 
         # Labels
         self.lblRefs = QLabel("References")