how can I undo selection ?

[xcpky]

When selecting text, I often use x many times to select multilines. But how can I undo the last line selection if I select more lines than I want? I also use other commands such as t and f to extend selection and sometimes wanna undo it. I think there should be a specific command for undoing the last selection behavior.

[Proful]

#5548

[the-mikedavis]

#1596