Manual group is one of the method to set up inventory group. You need to select products (variants) into the inventory manually one by one.
How to set up a Manual group?
Click Manual Connected Groups at the sidebar menu. Click Enable button if this is the first time you use this feature to create Inventory Groups.
Click Create a new Manual Group button. Enter an Inventory Group name. This name is not visible to your customers. It just helps you to easily identify what the Inventory Group is created for what purpose.
On the "Search Products" sidebar, select all the products (or variants) that you would like to add to the Inventory Group. You can type the product title to search for the product (or variants). Click the Add button to put them into the Inventory Group.
Finally, click the Save button. A new Inventory Group has just been created.
Make sure to check the Inventory Group has the same starting inventory quantity
Connected Inventory support to sync inventory correctly for inventory group has the same starting inventory quantity. Please refers to Article Why the inventory is not synced? for more ideas. You can go to Bulk Editor to check and update each product (or variant) inventory with the same starting Inventory.
🚀 Pro Tips: You can place a test order to test the synchronisation. Please refer to Article How to test the synchronisation (Inventory Group)? for the step.