Full Screen Mode vs. Windowed

[Cdot1117]

Im extremely new to P99 and noticed that when I switch to my preferred view (full screen mode) it switched back to windowed every time I open my spell book. Also, if I am forced to play on windowed mode...is there a way to expand the window? It's fairly small with no way to stretch the window.

Thank you!!

Trevann LVL 1 Druid