Sony a6500 Help Manual page 206

When both AE and FEL lock are fixed,
Hint
By setting [FEL Lock hold], you can hold the setting while the button is pressed down. Also, by setting [FEL Lock/AEL hold] and
[FEL Lock/AEL tggle.], you can shoot images with the AE locked in the following situations.
When [Flash Mode] is set to [Flash Off] or [Autoflash].
When the flash cannot go off.
Related Topic
Custom Key(Shoot.)/Custom Key(PB)
lights up.
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