The Select All command can also be run by pressing the Ctrl and A keys together on the keyboard. The Select all command selects all entities.

Location of the Select All Command

You can access it from the ribbon menu, Drawings tab, Edit title.

If Select All is used on the plan screen , all objects in that story plan are selected.

If Select All is used in any object command, all objects belonging to that command are selected.

If Select All is used when all stories are visible in the 3D view and in the object command, only the objects belonging to that command are selected in all stories.

If Select All is used when all stories are visible in the 3D view, all objects are selected in all stories.