In order to assign evaluators for assignments in bulk, you can:
1. Click on "Courses" in the side-navigation bar.
2. Select "Batches"
3. Click on the batch ID which you are looking to edit.
4. Once done, select "Settings" on the top-right corner of your screen.
5. Select "Module Completion Criteria" from the drop-down.
6. Here, You can select the modules which have assignment
7. Once done, click on the "Change Evaluator" button
8. Here you can select the evaluator you want to assign
9. Once done, select the students for whom this change needs to be implemented.
10. Save once done.