I make enough terrible mistakes from using Ctrl-Z on my computer, that's enough for me! ;) I sometimes 'undo' something then realise it was a good idea after all... >_< Being able to undo something is not always the best option...

Nah. That never works out quite the way you want. I just saw a surpringly good anime, called "Toki wo kakeru shoujo" ("The Girl Who Leapt Through Time", in English) dealing with this very theme. Undoing isn't always a good choice, and can lead to other, even less desireable, results. You undo something, you may miss out on a bit too much. As that anime put so well: "Time waits for no one."

it would be convenient to have that option. I have to admit, I would use it.

unfortunately there's no way to shrink the timeup but we can always send a bug report to the developers to fix what's wrong for the next releases until end of life occurs.

shift + del to erase bad memories ctrl + alt + del to eliminate hanged up processes... fortunately life is better than Windows..it has no bugs