Which keyboard does Sony a7m2 shutter take precedence over?

Sony A7 has aperture priority mode. The following is a description of the A7 mode dial:

P: the program is automatic;

A: aperture priority: select a, and dial the front/rear dial to select the aperture value.

S: shutter priority:

M: manual exposure;

1/2: Call out storage: select and call out the pre-registered settings in the storage of the shooting settings menu.

SCN: Scene selection.

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