[isabelle] A more adequate workaround for jEdit scaling on hidpi / high resolution
the documentation on Isabelle/jEdit has a subsection on scaling it on high
resolution screens ("Displays with high resolution"). It discusses scaling
fonts, but this leaves certain UI elements unchanged. There exists a
different workaround that should produce better results in most situations.
You will have to invoke Isabelle/jEdit via the command line, and pass in
the option `-J "-Dsun.java2d.uiScale=2.0"`. For example,
$ isabelle jedit -J "-Dsun.java2d.uiScale=2.0"
this should uniformly scale all UI elements by 2x. Other integer quantities
should work as well. Additionally, specifically for GNOME Linux, Java 9 or
newer, it suffices to set an environment variable `GDK_SCALE` instead; that
is, the same can be achieved with
$ GDK_SCALE="2" bin/isabelle jedit
It would please me to see this added in the documentation, or somewhere
more visible by someone with the ability to edit the relevant documents.
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