When editing page content, you must switch to HTML edit mode to use HTML or shortcodes.
Enter your page edit area by clicking the relevant page title in your Customize design > Pages admin area.
If the page content already contains shortcode and/or HTML, it will automatically be in HTML mode.
Switch to HTML mode by clicking in the edit toolbar..
..and (if this is a new page) delete ALL default content like
When your content box is cleared, you are ready to create page content in HTML mode.
Clicking the full screen icon in your Big Cartel content customisation area will allow you to view and work with your content more easily.
In almost all cases, Use my store’s layout should be checked.
To exit full screen mode after you have finished editing, click the close full screen icon.