1. The "used by grades" field can be edited in the individual generic handbook form.
2. To limit selections when assigning handbooks: from the Curriculum List (Legacy database: Admin > Curriculum; Windows App: Admin > System Settings > Curriculum), double-click the book name to open the generic Handbook form. In the Inventory Items grid, select the "In Use" checkboxes of the translations your club uses. Clear any checkboxes for those not used. The corresponding Inventory Item records will also be updated to "In Use" or "Not In Use".