Since LMMS has no window shortcuts, why not move the loops around automatically? Like, if u want to play the same part twice in a row without playing another part, the green button lights up and plays the loop. And when u don't want to play the loop like on a bridge or something, the green light shuts off. Why not copy and paste? Well, you could, but this would be quicker. And that brings me to my next request. playing music backwards. You can slow your music down all the way to 0...and then why not -1,-2,-3...
This would answer the copy and paste wish I had earlier.
Thanks for reading.