From the list view, select the tasks that you wish to batch edit

From the Actions menu, select 'Batch Edit'

Edit the attributes you wish to change.

Click 'Next'

Review the confirmation of the changes which will be made.  Click 'Back' if you want to make changes to your edits.  If you are satisfied with the changes click 'Done'

Select the items you wish to batch edit

Tap the 'Actions' menu

Tap 'Batch Edit' from the Actions menu

Edit the fields you wish to change

Tap 'Done'

Review the confirmation of the changes which will be made.  Tap 'Back' if you want to make changes to your edits.  If you are satisfied with the changes tap 'Done'