Hi Paul
A little tip worth remembering
If you want to copy the first 4 bars of a drum track, when you go to the copy function you will find small boxes one of which asks you "How many copies?" and there's another box which says "Ghost Copy". If you choose your number of copies and tick the Ghost Copies it will copy those 4 bars however many times you have selected. But as you have selected Ghost Copy any alteration you make to those initial 4 bars later will automatically be done on the other copies untilsuch time as you have glued them together. Saves a lot of time when you want to put an extra drum hit in, saves you doing them all by hand.
This is in Cubase/cubasis but other sequencers will have a similar function
Spike