Explains the functions related to selecting objects in the Viewport or Scene List.
The selection/deselection state of objects can be confirmed through the Gizmo that appears when an object is selected.
Select object
Selects a single object.
Shortcut :
LMB

Unselect all
Deselects all objects.
Shortcut :
ESC

Add / Deslection
Selects multiple objects while maintaining current selections.
Window :
Ctrl + LMB
Mac :
⌘ + LMB
