A configurable product will have one or more options, e.g. color or size. It connects to a group of simple children products so that it's easier for user to select.
After adding a configurable product, you can click "Manage" to manage this product:
Type a product name to search and link:
You also can click "Create All Children Products" to create new children products.
Click "Manage Properties" to add/edit/delete properties:
After it's done. Click a configurable product on the MtnPOS app, a popup window will appear with a list of children products:
Note: after a product is linked to a configurable product, it will not display at the home screen of MtnPOS app.