I want to have an option to select more than one object.
To have an option to copy, paste, cut or delete the selection.
CTR+A (Select All) would be also nice function.
you can also vote on same idea here:
and here: https://forum.mendix.com/link/ideas/449
and this idea here: https://forum.mendix.com/link/ideas/24 (this one is implemented in 7:14)