My question is related to:　https://collaborate.pega.com/question/font-size-rte-often-changes-unexpectedly-when-saving-or-refreshing

I created a mixin and tried to apply it to a skin rule for RTE by following the steps below:

      1. Select RTE in the component style tab of the skin rule and create My Format.

      2. In My Format, select "Use Mixin" and select the Mixin you created in advance.

I saved it in this state and tried to see what it would look like on the screen, but it didn't look different.

How can I get my mixin to work?