> ## Documentation Index > Fetch the complete documentation index at: https://docs.exode.biz/llms.txt > Use this file to discover all available pages before exploring further. # Custom JS code > Configure platform behavior with custom code in the school admin panel In the school admin panel, open **"For developers"** → **"Custom code"**, the **HTML** tab (the **"Custom HTML"** field). Code from this field is added to the `` of every school page before the app loads, so ` ``` ## Hiding interface elements The `excludeElements` parameter lets you hide individual platform interface elements for your school. Pass an array of element keys: ```html theme={null} ``` ### Available keys Video watch progress: the bar of watched segments under the video player in a lesson and the video watch progress in the student card (student management section) ## All parameters Hides the app download banner Array of keys of interface elements to hide (e.g. `videoWatchProgress`) *** *Updated: 2026-09-25 14:33 UTC* This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.