Thanks, oldyellr. It is a tribute to you that my Firefox dictionary now recognizes you.
In any case, I can find neither the Social Settings icon or the flag icon.
I'm not concerned about the brightness of the screen, it is the brightness of the light at the head of our bed that bothers me. I just want Hanne to use the reader, which she won't do if it acts in the least like she doesn't think it should. (The world in general doesn't live up to her standards. This was an endearing trait when we began out life together, but has become grating on the senses after 35+ years.)