You could create different roles and assign them specific permissions. For example, the role Administrator has full permissions, while a role called Page Creator could have permissions only to create pages and edit them, which includes adding public controls to these pages. To do that, go to the Administration tab in Sitefinity Admin area, then to Users. Create a new role. Then, go to the Pages tab and to the Permissions tab (as shown in attached screenshot). Select the role from the drop-down list and specify the permissions for it.
For more information, see the Permissions section in the User Manual which is part of the Sitefinity installation. (You could also download it from here
Let us know if you have further questions.
All the best,
the Telerik team