Misc doc improvements

egui/src/containers/collapsing_header.rs

@@ -122,7 +122,6 @@ pub type IconPainter = Box<dyn FnOnce(&mut Ui, f32, &Response)>;
 
 /// A header which can be collapsed/expanded, revealing a contained [`Ui`] region.
 ///
-///
 /// ```
 /// # egui::__run_test_ui(|ui| {
 /// egui::CollapsingHeader::new("Heading")

egui/src/containers/frame.rs

@@ -3,7 +3,17 @@
 use crate::{layers::ShapeIdx, style::Margin, *};
 use epaint::*;
 
-/// Color and margin of a rectangular background of a [`Ui`].
+/// Add a background, frame and/or margin to a rectangular background of a [`Ui`].
+///
+/// ```
+/// # egui::__run_test_ui(|ui| {
+/// egui::Frame::none()
+///     .fill(egui::Color32::RED)
+///     .show(ui, |ui| {
+///         ui.label("Label with red background");
+///     });
+/// # });
+/// ```
 #[derive(Clone, Copy, Debug, Default, PartialEq)]
 #[must_use = "You should call .show()"]
 pub struct Frame {

egui/src/containers/scroll_area.rs

@@ -74,6 +74,8 @@ pub struct ScrollAreaOutput<R> {
 /// });
 /// # });
 /// ```
+///
+/// You can scroll to an element using [`Response::scroll_to_me`], [`Ui::scroll_to_cursor`] and [`Ui::scroll_to_rect`].
 #[derive(Clone, Debug)]
 #[must_use = "You should call .show()"]
 pub struct ScrollArea {

egui/src/lib.rs

@@ -176,6 +176,9 @@
 //! by how much the slider has been dragged in the previous few milliseconds.
 //! This means it is responsibility of the egui user to store the state (`value`) so that it persists between frames.
 //!
+//! It can be useful to read the code for the toggle switch example widget to get a better understanding
+//! of how egui works: <https://github.com/emilk/egui/blob/master/egui_demo_lib/src/apps/demo/toggle_switch.rs>.
+//!
 //! Read more about the pros and cons of immediate mode at <https://github.com/emilk/egui#why-immediate-mode>.
 //!
 //! # Misc

egui/src/ui.rs

@@ -918,7 +918,7 @@ impl Ui {
     ///
     /// If `align` is `None`, it'll scroll enough to bring the cursor into view.
     ///
-    /// See also: [`Response::scroll_to_me`], [`Ui::scroll_to_rect`].
+    /// See also: [`Response::scroll_to_me`], [`Ui::scroll_to_cursor`].
     ///
     /// ```
     /// # use egui::Align;

egui/src/widgets/text_edit/builder.rs

@@ -46,6 +46,9 @@ use super::{CCursorRange, CursorRange, TextEditOutput, TextEditState};
 ///
 /// ## Advanced usage
 /// See [`TextEdit::show`].
+///
+/// ## Other
+/// The background color of a [`TextEdit`] is [`Visuals::extreme_bg_color`].
 #[must_use = "You should put this widget in an ui with `ui.add(widget);`"]
 pub struct TextEdit<'t> {
     text: &'t mut dyn TextBuffer,