I recorded something but I was away for about 30 min, and if I save it as is, it would save a whole bunch of blank recording. (I was recording somebody talking but forgot about stopping the app even after the person had stopped talking.)
What would be the best way to delete the huge portion of the recording where nobody’s talking?
Command+F will show you the whole (Full) timeline. Drag-select the parts you don’t want and Delete.
Drag-select some small part of the work and Command+E to zoom into just that. The third one I use all the time is Command+3 to zoom out only a little bit. There are pages of different Zoom tools.
https://manual.audacityteam.org/man/zooming.html
Koz