We’ve installed the desktop content installer but we can’t see a way to customise TinyMCE - there are a lot of options that we want to hide from our end users so we don’t end up with a huge mess of random fonts and colours.
Options can be configured in /{Rhythmyx_root}/rx_resources/tinymce/js/config/default_config.json
There is also some documentation on configuring TinyMCE on the help site here:
https://help.percussion.com/rhythmyx/implementation/tinymce/