Enable quick-order for your product on POS:
Select the “☰” icon at the top right-hand corner of the POS homepage
Select Manage Products
Key in terminal PIN
Select the TAB of the product that you want to enable quick-order
Here's a video guide from Step 1 to 4:Select the Category of the product you want to enable quick-order
Select the Edit button (pen icon) at top right corner
Select the "Enable Quick Order" check box
Once done, select CONFIRM
NOTE: The first product in a category will be selected as order whenever a Category is selected at POS & PAYMENT page when quick order option is enabled
Here's a video guide from Step 5 to 8: