If you mean inserting and resizing audio events on a single track, forcing existing events on that track to move along the timeline to accommodate, you can do this by selecting ‘Shuffle’ in the Snap type menu on the toolbar. This works for events which are already in the project, not for audio files which you drag from the right zone (for example).
You could also try using the Range tool and ‘Paste time’ (Ctrl + Shift + V). Paste time can also be used in combination with ‘Global Copy’. Look in the Edit / Range sub menu.