If you want to quickly switch to frequently used layers in your AutoCAD drawings, you can assign keyboard shortcuts to the individual layers and switch them with a single button/key.
In the CUI dialog first create (see the "New command" icon") new commands (menu macros) in the form of:
(replace "mylayer1" by your individual layer names)
Then assign keyboard accelerators to these newly created commands. In the section Keyboard shortcuts > Shortcut keys attach the required key combination ("accelerator", "hotkey"): first mouse-drag the command from the list of commands to the above mentioned section and then on the right side fill in the field Keys (good candidates for key combinations for a series of layers are e.g. Ctrl+NumPad0 to 9, Alt+NumPad0 to 9, Ctrl+Alt+NumPad0 to 9).
After you exit the CUI dialog you can quickly switch your layers from the keyboard, just by a simple key combination.