The capability of editing lines will depend on both your role and if an approval workflow is enabled.
Approval Workflow Not Enabled
Here is a breakdown of what each role can edit by bulk when an Approval Workflow is not enabled:
Approval Workflow Enabled
Here is a breakdown of what each role can edit by bulk when an Approval Workflow is enabled:
Note: For team assignments, anyone from the team can approve/respond to any line item assigned to the team.