The WEB POS default setting is to show the category tiles (see image below).
However, if you're using the WEB POS on small screen (i.e., mobile phone, or tablet), you might want to hide the category tiles so you can see more of your products on the screen.
To hide the category tiles, please follow these steps:
Open the left-side menu by clicking on the three stripe lines on the top left corner
Click on Settings and select "PRODUCTS" tab
Enable the "Hide categories tiles"
Your sale screen will appear like the image below