Sharp FO-IS125N Operation Manual page 13

RESOLUTION key
20
When a document is in the feeder, press to adjust the scanning resolution for
transmission (p. 55).
RELEASE key
21
When a fax has been received to memory instead of being printed out
because the Secure Fax function has been activated, press this key to enter
the Secure code and print out the fax (p. 84).
START key
22
Press after dialing to send a fax (p. 57).
Arrow keys
23
Use to scroll through and select settings, and to search for stored
destinations.
A Look at the Operation Panel
11