The swappable blocks feature allows you to switch between Template Blocks.
In order to switch template blocks you will need to create two blocks (See Block 1 and Block 2).
Note: if you need assistance on how to create Template Blocks, please click here.
Creating two blocks will allow you to switch between them, but you can also apply the setting to a regular Content Block (i.e Multi-Column) by clicking the settings cog.
If you wish to have your Template Blocks interchangeable, navigate to the Template tab, click the Drop Down Menu and select Edit.
Set the Swappable with Block setting to the other Template Block then save it.
Follow the same procedure with the second block.
Drag one of these Template Blocks into your Template and click the horizontal arrows icon to switch to the opposite block.