You can make your own plugin for this.
In ep.json add client_hook:
{ "parts": [ { "name": "myPlugin", "client_hooks": { "aceEditorCSS": "ep_myPlugin/static/js/ace" } } ] }
In static / js / ace.js write only:
exports.aceEditorCSS = function(hook_name, cb) { // inner pad CSS; return ['ep_myPlugin/static/css/ace.css']; }
and in static / css / ace.css:
#innerdocbody { font-size: 14px; line-height: 18px; }
You are done!
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