The first step is to set up Printing Rules in pos.sapaad.com.

1. Visit pos.sapaad.com
2. Visit Setup > Location Setup.
3. Select the location at which you want to set up printing rules.
4. Click on Print Settings and click Printing Rules.
5. Under Walk-In order type, select the Print Template and assign it to the local printer.
6. Click Save All.

Next, pair or connect the printer to the Android tablet.

Finally, assign the printer to the print template.

1. Log in to the app.
2. Click the three horizontal lines you see at the top left of your screen and click Printer Settings.
3. Click on the print template (for e.g. Kitchen Slip).
4. Swipe down to refresh the printer list.
5. Select the printer and save the settings.

Click on this link for the list of Android-compatible printers.