Text in the bottom left corner isn't very legible.

What if you made the text in the left corner small tracked out text horizontally across the bottom?

Thanks Penn for your interest.
To be perfectly honest, I didn't understand your advice... (google translator is useless English->Polish).
Here is a part of the map I made some years ago. I had a great problem with lettering on satellite image. Finaly I made black letters with white outline and names of villages in vibrant magenta. Some details http://mastertopo.com/maps/everest/index.htm

The bottom text like this:

Thanks again, pdf edited
"a picture is worth a thousand words"