Redo button and shortcut to open the brightness control

[jruiz72]

Hi, everyone,

I would like to know if Labelme has the option to do "Redo" (opposite Undo Ctrl+Z) because sometimes by mistake I press Ctrl + Z to remove only two or three points but all the polygon disappears so all the job must be done again.
The other question, sometimes it's necessary to adjust brightness and contrast but I think it takes too much time to go to view> brightness contrast to open that window. Does someone know if this can be done with a shortcut?
Finally, I consider that inside the brightness contrast window a button to "Restore default values" will be a good improvement.