Answer: Please follow the steps mentioned below to change User Role permissions.

1. Go to Admin options.
2. Click on Role permissions.
3. Select the appropriate Role from Select Roles Dropdown.
4. You can select the Landing page and modify permissions to Application pages by checking or unchecking the respective pages to the corresponding Role. And
5. Click on update.

Please find the PPT tutorial for reference here – http://www.slideshare.net/OfficeTimer/set-permissions-user-roles-officetimer