To label an item for pending destruction (i.e. not for immediate destruction until sign off), click on the new destruction quick action button on the left hand side.
Then, click Add to pending list and fill in the required information, including the item and quantity to be sent for pending destruction.
✏️ Note: this action will allow for a pending destruction at this location. If you require to perform a pending destruction at another location, you should first transfer out the item and then label it for destruction at that location instead.