1.Permissions: Configuration Management > Layout > Basic Access: Toggle on "Create" & Administrative Access: "Update All"
2. Product Plans: Elevate
3. Activities to be Completed: None
Steps
Step 1. Post you are done creating a Layout, Click on Save and Next.
Step 2. You can choose to mark new custom layout as default, by doing so it will auto populate the layout that all the user will see when no specific profile has been assigned & Click on Select profiles for the layout radio button to choose specific profile for custom layout.
Step 3. Once you have selected desired user profile , Click on Save.
Step 4. Custom layout will be seen on layout listing page, where in you can check which user profiles is setup for this newly created layout