This article explains how to set/update Item box qty rater then Item qty via Purchase Order Entry screen.
1. Go to Receiving Register
2. Select Create new Purchase Order
3. Fill all fields and add Items
4. Highlight Item you want to edit/update Box dimentions
Please note Items should have already Box dimensions set as per below example:
5. Go to Unit field and press Ctrl + Enter. Box dimension screen will pop-up
6. Remove Total qty and enter how many boxes you would like to re-order. WMS will auto back-calculate Total Unit Qty based on Box selection.
7. Select "Add as Units" and OK
Item "Buy Dementions" UDF field selection can be set under Tools > Preferences > Inventory Tab >