Without knowing which messaging app this is (it doesn't look like any menu I'm seeing on the Google Messages app) and how the screenshot came to be, we can only take some guesses. I should also note for the OP - consistently draining your battery that low is going to result in shorter lifespan of the battery.
As for your request for "how-to" for the site/forums @
Reynoldswrap - just as with other forums I'm on, post deletion is done through the edit post button. However, it doesn't serve the community to delete "outdated" posts, just leave them, I see no reason to do that as they could still be helpful to others whose devices may not be as current as other's devices are. Your request for this type of how-to should be its own post, maybe in the site help/feedback section rather than a reply to another post -
https://forums.androidcentral.com/site-feedback-help/