To enable preset reason feature, you must:

- Go to: Inventory \> Settings \> Inventory Adjustment
- Enable: Preset Change Qty Reason
- Enable: Technical Settings \> Manage Stock Change Qty Preset Reasons

Once is activate you will require te add a Preset reason to validate
stock products change quantity.

To allow an Stock Manager configure preset reasons easily, you should:

- Select Stock Manager user on: Settings \> Users
- Enable: Technical Settings \> Manage Stock Change Qty Preset Reasons
- Go to Inventory \> Configuration \> Inventory Adjustment \> Change Qty
  Reasons