Sony A7RIII ILCE-7RM3A Operating Instructions Manual page 571

Help Guide
Interchangeable Lens Digital Camera
ILCE-7RM3A
α7RIII
MF Assist (still image)
Enlarges the image on the screen automatically to make manual focusing easier. This works in Manual Focus or Direct
Manual Focus shooting.
MENU → (Camera Settings1) → [
1
Turn the focus ring to adjust the focus.
2
The image is enlarged. You can magnify images further by pressing the center of the control wheel.
Hint
You can set how long the image is to be shown magnified by selecting MENU →
Time].
Note
You cannot use [ MF Assist] when shooting movies. Use the [Focus Magnifier] function instead.
[ MF Assist] is not available when a Mount Adaptor is attached. Use the [Focus Magnifier] function instead.
Related Topic
Manual Focus
Direct manual focus (DMF)
Focus Magnif. Time
MF Assist] → [On].
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(Camera Settings1) → [Focus Magnif.