Are there a set of creative elements that you want to group together? Maybe they represent an overarching element or a specific theme? You can use the Custom Tag Group feature to understand the impact of multiple elements.
To use this feature, navigate to the Comparison Reports page. On this page, check off the creative elements that you want to group together.
Then, click the "Create Custom Tag" menu option in the bottom right corner. In the window that pops up, you can name the Custom Tag Group, add/delete creative elements that you'd like included, and add a description of the Custom Tag Group.