Settings
Click Settings, in the header to change the options for Polar Tracking, Object Snaps, Units, and Navigation.
All settings can be modified while a command is active.
Snap tracking
Turn polar tracking on or off, and set the degree increment for polar tracking.
Object snaps
Turn object snaps on or off.
Units
Choose the linear format, linear precision, angular format, and angular precision in the drawing.
Navigation
Change the zoom direction between Standard and Reverse. While set to Standard, rolling your mouse wheel forward will zoom in. While set to Reverse, rolling the mouse wheel backward will zoom in.
You can also hold Ctrl (Windows) or ⌘ (Mac) while rolling the mouse wheel to zoom.
Dark theme
AutoCAD defaults to a dark theme. Turn dark theme on or off within the user profile drop-down in the top-right of the header.