As far as I know 3 and 4 number models (xxxD and xxxxD, T8i = EOS 850D) do not support custom shooting profiles. If you want to use such option you should switch to 2 or 1 number models (xxD, xD) like 70D, 5D, 1d and so on.
This option is counted as more advanced and reasonably is not available on low end models.
P.S. In Magic Lantern there is such option, ...
There's not a lot to do here. The light itself is just an on-camera flash that isn't quite wide enough to cover the same area as the lens. It could even be the pop-up flash built into the camera. If you're close enough to your subject, you can let flash fall-off do what a narrow flash zoom would do, since the parts of your subject that you'd want dark (if ...
Just saw this question. It’s new to me
This answer is a DSLR in general not for the 700D check this site out
Press the info button and it should get you out of the stuck q button/display mode