Enable it in the Trading Condition Setting: 1. In the left sidebar, go to Trading Condition Setting and open the condition set that this buyer (or public page) uses. 2. In the "Collaboration Terms" section, turn on Show Inventory Quantity. The change takes effect immediately without needing to click Upload Changes. Once enabled, your available inventory will be displayed on the Catalog and Quotation. When disabled, the Catalog will not show quantities and the other party must ask separately before ordering. Newly created Trading Condition Settings have this toggle off by default. The Allow Backordering toggle on the same card determines whether items with zero inventory can be ordered. When you turn off Show Inventory Quantity, it will automatically be forced on and hidden. Public page visitors will see "Stock N," "Out of Stock, backordering accepted," or "Out of Stock." The numbers come from the Inventory field of the product. Please maintain this in Product Management when editing products. Condition Settings are shared; if you only want certain buyers to see inventory, create a separate condition set.