Extending a section without Copy-Paste [SOLVED]

I’ve had trouble figuring out how to do this- is there any option if I want one or multiple recorded parts to extend, without having to manually copy-paste then try to match them all up and seamlessly fit them together without the clicking sounds that come with the copy-paste? Hopefully I’m making sense.

“Repeat” , (in Effect menu), avoids the need for repeated copy-paste … http://manual.audacityteam.org/o/man/repeat.html
But there will still be a click if you don’t select the start & end-points very carefully ,
see … http://manual.audacityteam.org/o/man/tutorial_looping.html