Please add a shortcut key for "deselect all objects across all charts"

[MikeT]

Hello FXT4 Team,
If a user is busy marking up many charts, but wants to deselect all objects to make screenshots clear or for any other reasons, the program requires clicking on each object and using the deselect objects shortcut keys. Please add an extra option for users to assign a shortcut key combo to "deselect all objects from all charts."
Thank you,
Mike