To undo something when you’re editing, for a Mac device, you would hit COMMAND + Z and for Windows, you would hit CTRL + Z. If you accidentally undo too far, COMMAND + SHIFT + Z will redo the last “undone” thing on a Mac device, and CTRL + SHIFT + Z on a Windows device.
You can also separate selections, heal separations if you do that on accident, and consolidate them. To separate a selection on a Mac, you would need to hit COMMAND + E and for Windows devices, CTRL + E. To heal said separation on a Mac, you should hit COMMAND + H and for Windows, CTRL + H. Lastly, to consolidate those selections, you should hit OPTION + SHIFT + 3, or on a Windows device, ALT + SHIFT + 3.
You can also duplicate selections and trim a selected region of the track with shortcuts. To do this on a Mac, you would need to hit COMMAND + D to duplicate and COMMAND + T to trim. On a Windows device, you should hit CTRL + D to duplicate and CTRL + T to trim.
These simple shortcuts for sessions, recording, and editing on FL Studio will help make your life so much easier. You could save precious editing time while giving a better professional impression. You could spend less hours doing the tedious parts and more hours actually editing with these simple shortcuts.