Excel Select Region (All Cells) Shortcut
Select Current Region (Possibly Entire Worksheet)
This Excel Shortcut selects the current region.
PC Shorcut:Ctrl+A
Mac Shorcut:⌘+A
Remember This Shortcut:
A for All
A for All
Select Entire Worksheet
This Excel Shortcut selects the entire area.

PC Shorcut:Ctrl+A
Mac Shorcut:⌘+A
Remember This Shortcut:
A for All
A for All