The lower-right part of an editor window can display some at-a-glance information. This area is called the status bar.
From left to right, this bar shows:
Progress and informational alerts are clickable, and will display details about why the are being displayed. Both are not typically visible.
The cursor/selection measurement sections are normally displayed.
The find results are only visible when a search is active within the current document or project.
Both the selection measurement and find results sections can be hidden using the menu item View > Show/Hide Status Bar.