At all times, one of your Themes will serve as a default Theme. Any images you upload will take on this Theme as standard.
If you want to use a different Theme for some of your SmartFrames, you can select an alternative Theme while copying the embed code from the Image Manager. Alternatively, you can change the Theme of an already existing SmartFrame in the Embed Report within the Insights panel.
Changing the default Theme
You can change which Theme is the default Theme at any time. Once you do this, all SmartFrames that are set to use a default Theme will be updated to use the newly selected default Theme.
To do this, simply click on the star symbol in the bottom-left-hand corner of the Theme card in the Theme panel:
Deleting the default Theme
If you want to delete the current default Theme, you will first need to select a new default Theme. If you only have one Theme, deleting the default Theme will not be possible.