Here is another very useful community tip especially for dialog editors from Joe Belliston….
Here’s a tip for the post community who have a hard time finding enough room tone to make clean dialogue transitions. I like to duplicate the clip(s) with the room tone, drag the handles out as far as they go, highlight the clip and hit Cmd+U to bring up the strip silence window. Finesse the settings and click Extract. That will leave you with all the room tone without any dialog on that clip. Shuffle the extracted room tone together and listen to make sure there is no unwanted noise, and you will be left with a nice long selection of room tone.
Mike says - That is a nice use of Strip Silence where you keep the silence rather than loose it and keep the audio.