GTK/Qt scrolbar tip

I found that one by accident, it works with GTK+ and Qt apps I don’t know about other toolkits(I don’t use anything else than GTK+ on daily basis and am too lazy to test).

To quickly scroll to desired location one may middle-click on a scrollbar. The viewport will then jump right where you want instead of simply moving towards that position, not necessarily reaching it in the latter case. It might or might not be useful, hope it helps.