Thanks David I knew about this already but it is good advice.
Ted I did explain in the posts about how to do small edits.
You left click on the track at the position where you want to start the edit then holding the L button down drag to where you want the edit to stop, it highlights up that portion of the track to blue. Go to edit then left click on delete. That deletes that portion of the track that is highlighted. This is also handy for trimming off surplus bits at the start and end of a recdording You can also use this drag technique to do other edits like insert silence or add effects adjust volumes etc just to that portion of the track highlighted. To insert a small extra piece of silence to lengthen the track just click on the piece of track where you want the silence to start then go to to generate and click on silence, a box comes up and you type in the length of time you require .1 secs or whatever. then hit ok. Any probs send me a PM and I will help to talk you through it in more detail. Using these techniques can lengthen, shorten, cut out or mute bad bits, adjust volumes insert effects in fact the works.