On Samsung it's under Settings > Advanced Features > Side Key, it's probably not dissimilar on other manufacturers
I have an S10. Side key is now changed to open cam with single press, but I still need to unlock the screen, so it’s not going to give me the instant shot one-handed shot I’m after.
@Sergeant_Pluck started
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On Samsung it's under Settings > Advanced Features > Side Key, it's probably not dissimilar on other manufacturers