Another way to do it is the xlsclients command. Also, I can reliably tell based on the fact that the contents of the XWayland windows are fuzzier. I can do th

Another way to do it is the xlsclients command. Also, I can reliably tell based on the fact that the contents of the XWayland windows are fuzzier. I can do that because I have had lots of practice discerning fuzziness, because I am using a old monitor (as opposed to a HiDPI display) and because I have a fractional (non-integral) scaling factor declared in my monitors.xml file--when the scaling factor is set to 1.0 there is no difference in fuzziness as far as I can tell.