Step By Step Guide
First of all we need to load the editor. To do this click ' Content ' on the left menu, once this drops down and gives you some more options, click ' Pages '. Then select the page you would like to edit, finally click the 'Editor' button in the top left.
The next step is to click where you would like to add the iframe in the editor. When the toolbar pops up click the ' + ' button labelled insert .
You should now see a large list of elements to insert. For this guide we want to choose the option on the right labelled ' Iframe '.
After this you will need to add the Iframe URL, enter the height and enter the width. Once you are happy with the options you have added click the ' Apply Changes ' button.