Views:
1. Click on Administration menu in web apps.
2. Click on access rights button.
3. Select the user/group.
4. Click on the fields button.
5. Select MDTMTCE screen ID (or another screen).
6. Select MYAssignments in the page field (or whatever is available)
7. You will see a list of fields you can modify by setting the visible, enabled, required and default options.