Assigning user numbers to compound fixtures

Howdy,

I'm sure there is something simple I'm missing here, i am making compound fixtures with 19 rgbw cells, rather than clicking on each rgbw cell in the fixture window and changing its user number how can i highlight 19 of the cells and assign them 1.1 > 1.19.. this doesn't seem to work for me,and obviously it takes a heap of time to do them individually if you have 24 lights with 19 cells in each! i have tried dragging my pointer over 19 cells and pressing set then 1.1 > 1.19 but this doesn't work.
Also is there a version of shift for selecting fixtures in a patch? using a mouse instead of entering the numbers.
thanks in advance!