Draftsight in Linux: How can I increase menu font size and toolbar icon size?

I am running Draftsight Beta V1R4.0 in Linux Mint.  It is working great, but I would like to increase both the menu font size and the toolbar icon size.  I understand that normally I would select Tools > Options > System Options > Display > Screen Options to change icon size (and may be font size?).  However, when I get to Screen Options there is nothing listed.  Is there some way I can tweak a Draftsight settings file manually to increase the menu font and icon size?

Thanks.

janthird