diff --git a/crates/egui/src/input_state/mod.rs b/crates/egui/src/input_state/mod.rs
index dc07ffeb7..55c76bb06 100644
--- a/crates/egui/src/input_state/mod.rs
+++ b/crates/egui/src/input_state/mod.rs
@@ -1419,6 +1419,9 @@ impl PointerState {
 
     /// Was the given pointer button given clicked this frame?
     ///
+    /// A click is registered when the mouse or touch is released within
+    /// a certain amount of time and distance from when and where it was pressed.
+    ///
     /// Returns true on double- and triple- clicks too.
     pub fn button_clicked(&self, button: PointerButton) -> bool {
         self.pointer_events
@@ -1453,11 +1456,17 @@ impl PointerState {
     }
 
     /// Was the primary button clicked this frame?
+    ///
+    /// A click is registered when the mouse or touch is released within
+    /// a certain amount of time and distance from when and where it was pressed.
     pub fn primary_clicked(&self) -> bool {
         self.button_clicked(PointerButton::Primary)
     }
 
     /// Was the secondary button clicked this frame?
+    ///
+    /// A click is registered when the mouse or touch is released within
+    /// a certain amount of time and distance from when and where it was pressed.
     pub fn secondary_clicked(&self) -> bool {
         self.button_clicked(PointerButton::Secondary)
     }
diff --git a/crates/egui/src/response.rs b/crates/egui/src/response.rs
index 54d53f2b4..81d04f1ef 100644
--- a/crates/egui/src/response.rs
+++ b/crates/egui/src/response.rs
@@ -199,6 +199,12 @@ impl Response {
 
     /// Returns true if this widget was clicked this frame by the secondary mouse button (e.g. the right mouse button).
     ///
+    /// A click is registered when the mouse or touch is released within
+    /// a certain amount of time and distance from when and where it was pressed.
+    ///
+    /// Note that the widget must be sensing clicks with [`Sense::click`].
+    /// [`crate::Button`] senses clicks; [`crate::Label`] does not (unless you call [`crate::Label::sense`]).
+    ///
     /// This also returns true if the widget was pressed-and-held on a touch screen.
     #[inline]
     pub fn secondary_clicked(&self) -> bool {
@@ -214,6 +220,12 @@ impl Response {
     }
 
     /// Returns true if this widget was clicked this frame by the middle mouse button.
+    ///
+    /// A click is registered when the mouse or touch is released within
+    /// a certain amount of time and distance from when and where it was pressed.
+    ///
+    /// Note that the widget must be sensing clicks with [`Sense::click`].
+    /// [`crate::Button`] senses clicks; [`crate::Label`] does not (unless you call [`crate::Label::sense`]).
     #[inline]
     pub fn middle_clicked(&self) -> bool {
         self.clicked_by(PointerButton::Middle)