Garmin NavTalk Owner's Manual page 20

To familiarize yourself with the placement of function
keys on the NavTalk, refer to the fold-out example in
the Quick Reference Guide supplied with this manual.
The keys on the NavTalk often have multiple functions
and specific applications for Cellular and GPS features.
The POWER Key turns the unit on and off and controls 3-levels of
backlighting.
The PAGE Key scrolls through the main data pages in sequence and
returns the display from a sub menu page to a main page.
The ENTER Key confirms data entry and on-screen responses. This
key also activates highlighted fields to allow data entry
The SEND Key dials phone numbers and answers phone calls. It
also performs the "Flash Hook" function, pre-empts Auto-Pager mode,
and sends position when held for more than 1 second during a call.
The QUIT Key returns you to a previous page, or clears data entry
and restores a data field' s previous value. It also mutes the micro-
phone when held for one second during a phone call.
The END Key ends a phone call and mutes the ringer. It cancels
Auto-Answer and Auto-Pager without answering a call.
The MENU Key displays a menu of available options for the current
page. Press twice to display the main menu. When held for one sec-
ond it prompts for the Lock/Security Password to lock the phone.
.