How to use your own style sheet in Internet Explorer for Windows 10

1. Select the tools icon in the top-right corner of the Internet Explorer browser window.
   
2. Select Internet options from the menu.
   
3. In the Internet Options window, select the Accessibility button in the bottom-right corner.
   
4. In the Accessibility window, select the checkbox labelled Format document using my style sheet.
   
5. Select the Browse button.
6. A file explorer window will appear.  Locate your style sheet file, then select the Open button.
   
7. In the Accessibility window, select OK to save your style sheet selection.
   
8. Back in the Internet Options window, click OK to return to Internet Explorer.

Note: If this does not work it could be because your computer settings are managed by someone else (an IT department or administrator for example). If so, you will need to contact them to access these settings or for help.