Hey Brian
I don't know, I have never been able to adjust the window size
other than to go to full screen or this size
I poked around but nothing successful happens
I like the window this size, I send RAC files from RDSS so I don't have to hand enter my lines, But when I do hand enter It's nice to have the window small so I can see the RDSS lines and the Dos box window together.
I also like to see the TPR screen and the final thormation screens
on the same screen
Maybe there is something on the DosBox web page
Bill