Cut Function - Leaving Empty Space

To cut out a range of threads and leave the area open (threads removed, but the space available), hold the shift key down when pressing Cut on the Home Menu.

The keyboard short cut for Cut will also work (pressing Shift - Delete) to cut and leave the space open.

In the screenshot below, the threads at the cursor position were Cut out and the space is open and available to use for pasting or clicking in warp threads.