Hi Riko,
You can easily select a series of drawings in the X-Sheet (just click the first thumb, hold Shift and click the last). You can now do normal copy and paste using Ctrl C and Ctrl V (Cmd C and Cmd V on Mac).
You can also cycle such a selection. The menu item is Edit > Cycle Selected Drawings Once.
Reversing the selection, is a feature not implemented yet, but it is planned for the near future. Until then, you will have to copy/paste the drawings one by one to get them in reverse order.
Note, that when you copy drawings like this, the copies are “clones”, meaning that they are linked to the original and will update if the original is changed. This is great for many reasons. And if you need a clone to lose its link, you simply make it “original”, by hitting O (while on the drawing).
I hope this makes sense. I’ll be happy to answer more questions or comments!
Thanks,
Niels