This command:

Does this:

Current tab

Reads from the ST microcontroller and displays the contents of the selected memory tab.

Active Sector(s)

Reads from the ST microcontroller and displays the contents of the selected sectors.

Address Range...

Reads from the ST microcontroller and displays the contents of the selected memory area from the selected memory tab.

All tabs

Reads from the ST microcontroller the contents of all existing memory and Option byte information.