I thought of three possible fixes for X11 apps opening off the screen over the course of the afternoon:
- install a window manager and let that handle things. Thus, I tried fvwm (missing dependency, fail), twm (missing dependency, ditto) and dwm (in Homebrew, installs fine but is a tiling wm so not as easy a fix as I hoped)
- using Xdefaults or Xresources, but was unable to get either of them to work, as I suspect they are not respected by XQuartz.
- Install wmctrl via Homebrew and then use
wmctrl -r "umui" -e 0,60,60,900,600as an application in the X11 menu. This worked best
so now Command-D fetches the window, which has opened with its title bar and buttons off the screen, back onto the desktop, resizes and positions it correctly. Much better.