This documentation is not using the current rendering mechanism and will be deleted by December 31st, 2020. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.
Simple iframe for TYPO3 CMS Backend¶
Simple iframe is a tool that helps you preview any page as an iframe in the backend of TYPO3.
Keep in mind that some websites do not allow framing.
The URL that you want to frame can be configured in the Extension Manager. If you need to configure the URL, switch to the module "Extension Manager", select the extension "simpleiframe" and press on the configure icon.