If you want to prevent one or more users from modifying or editing fields on your Tree Map, you can update their user role permissions from the Manage tab. Under Manage, click Roles on the lefthand side bar. You are given the option of editing existing roles or creating a new, additional role.
To edit existing roles, click Edit in the upper right. This will enable you to toggle between user permissions. Make sure all fields are set to Read Only. Fields set to invisible will not appear on the users' maps. Remember to always click Save following any changes.
If you do not have an existing user role for Ready Only permissions, read how to create a new role here.