Font size with XMing X11 forwarding too small

Question

I am using a GUI application running on a remote Linux host, but displaying on my Windows desktop using the XMing server, PuTTY with X11 forwarding, (and ssh -X as well, which is done by SLURM's srun with --pty option).

But the default font is a bit too small. How to increase it?

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It took me a while to find the answer, so I'm adding it here for anyone else doing the same search.

Solution

As suggested here, passing the -dpi 108 command-line argument to the XMing server usually works (the default is 96).

Comments

[nedned]

This is also a solution for the same problem with xpra. In this case you want the --dpi flag.