Created attachment 171398 [details] Ctrl and shift actions This is a small detail that I think might be missing. If you see the attached gif, you'll see in the first action how ctrl pick + shift range pick works as expected. But in the second action I toggle off the ctrl-picked item, yet the shift range selection still happens at that point. If the item is toggled off it shouldn't count as a starting point for a selection, I think. What I did in my own implementation (in another application) was keep a date of selection on every selected item. And I use the most recently selected item as the starting point for range selections. When an item is deselected the date is set to 0. This is not critical but I thought I'd just share it just in case.