# Fill gaps between selected items in Reaper Use opt+f to perform this action. Cmd+opt+f will do the same with the last settings used. If stretching audio with this action, the preserve transient option will save the transient from being smeared.[^1] For quantizing drums, I like to [[Use a leading pad to create a smoother quantization]]. For other instruments, I like to use backward temporal masking (see [[How to mask time edits]]) or let the drum transient mask the edit. [^1]: [Drum Editing In Reaper: Part 2](https://www.soundonsound.com/techniques/drum-editing-reaper-part-2)