To clear the fields of the selected items do the following:
- Select items in the SharePoint list like usual
- Right click on selected items
- Select Tag option in the menu.
- Click Down-Arrow button next to the field to clear value in. Metavis will popup its regular field mapping dialog.
- Select "Make value empty" checkbox in this dialog and confirm it with Ok button.
- Repeat this procedure with other fields.
- After you will finish this wizard the values for the selected fields will be cleared for the selected items.