Tim runs a low powered radio station. He's been using Audacity to edit his audio, but recently, it has stopped resetting to the beginning when stopping recording. Now it creates a new track, and that prevents him from overdubbing as he had been in the past. Leo says there's likely a setting in Audacity that will disable the change. He's going to have to use a second, separate track and then position them to overlap. But Tim has problems with that since he's visually impaired. Shift+R can create a new track and then use the cursor keys to move along the track.
From the chatroom - https://manual.audacityteam.org/man/tutorial_multi_track_overdubbing.html