README: document how to set hotkeys w/ config file

re #81
bk138 · Apr 18, 2020 · fbda8bd · fbda8bd
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commit fbda8bd
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diff --git a/README.md b/README.md
@@ -173,6 +173,9 @@ The descision which tool to use follows a simple policy:
       The same logic holds for the buttons.
 5. Slave device config takes precedence over master device config, which
    in turn takes precedence over the fallback default config.
+
+You can also change the [hotkeys from the config](data/gromit-mpx.cfg#L5) file by setting the respective
+`HOTKEY` and/or `UNDOKEY` values.
 
 ## Building it