The shortcut bar

You can select tools you use often to display on the Shortcut Bar displays tools you often use.

You can edit it from “Main Menu” → “Settings” → “Display Shortcuts”.
Set it by adding check marks to the tools you want to add to the Shortcut Bar display.
The tools you can add are shown below.

Undo/Redo and the Spotlight Tool are set by default.

The Shortcut Bar
Caption. The Shortcut Bar