Almost all digital cameras with interchangeable optics display a symbol that looks like a crossed-out circle. This symbol isn't a contemporary feature but was already seen on film devices.

which is what each symbol means in the advanced photo settings in the camera app. Timer Icon: The timer icon allows you to set a delay before capturing a photo. By default, it is turned off.

Even though Apple’s Camera app looks minimal and less cluttered than other camera interfaces, it can still confuse new users. Some existing users also still find camera app icons confusing, thanks to ...