I find the text in the DraftSight HelpGuide too small to read.  The classic MacOS Command-+ keyboard shortcut does nothing, and the Zoom item in the Window menu item does not zoom, it instead goes to full screen, which is not the same thing.  Nor is there a command to go back to the normal size window, although the green button (upper left corner of the window) does work.  The Zoom function appears to be broken.