Hi Ford,
Thanks Dwayne @dillenbata3 ,
Here’s what I think has happened:.
There are some default Settings, that made this weird situation possible, the one I would recommend to turn off immediately and leave turned off forever, is the Edit > Lock Object Modes.; I don’t knwo of any advantages, only disadvantages, of leaving that on. Because of that Setting, you were able to Deselect the GP Stroke, by Selecting the Camera and because of the Only Show Selected Button, you couldn’t see the Keyframe anymore. And you couldn’t Draw anymore either.
