Since you've helped me greatly with my recent request, I'll try again.
I've heard about it, but can't remember where and how to describe the function. Therefore "googling" isn't an option, really.
The main timeline - the magnetic one - is called timeline, right? So once I stack clips on top of it, those tracks are called "sub timeline"? Anyway, when using the "T" option to trim the clip on the main timeline, all the stacked clips on top of it move with it.
You feel me? what's the keyboard shortcut for the function to still trim the main timeline without interfering with the stacked clips?
droeder wrote: ...The main timeline - the magnetic one - is called timeline, right? So once I stack clips on top of it, those tracks are called "sub timeline"?...
Besides what Ben said, the connected clips can be either independent or group into a "secondary storyline" by selecting them and doing CMD+G. For more info see the FCP docs. The entire FCP user guide is available free on the Apple book store:https://books.apple.com/us/book/final-cut-pro-user-guide/id976299089