After a match and Greedygammon calls gnubg to analyse the match gnubg runs alllway fullscreen overwriting the screensetting I use myself (gbubg saves the last setting used). I assume GreedyGammon calls gnubg to run fullscreen) As i myself NEVER run gnubg fullscreen (i don't like to have it fullscreen) I have to reset it each time.
My husband wrote a small exe which i used in the past to open and analyse the last match played on Greedygammon. But its more handy to do it from Greedygammon. When its due to greedygammon can you fix it that it will just run at the setting of the screen as was saved by the user.