well for different fonts in gimp just double click on the text icon, and it gives you preferences. I usually use small text in the corner, so i can't give much advice, but i think it's mostly the darkness that makes it hard to read.
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"Shepard, dosn't the Bible have some pretty strict rules about killing?" "Yes. It is however, rather fuzzy on the subject of kneecaps"
Zoe and Shepard Book, Firefly