Go to ‘Settings’ from the menu symbol 
Select ‘Printer Settings’
Enable switch for ‘Quick Cash’, ‘Quick Coupon’ & ‘Quick Card’ and click on ‘SAVE’ button > message will appear ‘Settings updated successfully’ then click on ‘OK’ > click on ‘MULTI-PRINTER SETTINGS’
Click on ‘ADD PRINTER’
Enter ‘Printer Name’, ‘Quantity’, select ‘Paper Size’ as ‘2 inches’ for T1 mini and ‘3 inches’ for T1 & T2 machine, ‘Select Printer from Settings’ as ‘Sunmi T1 Inner Printer’ from drop-down options > select ‘Receipt’ in the drop-down option of ‘Select Template Type’ > select ‘Default Receipt’ in drop down of ‘Select Template’ > tick all 5 options under ‘Use same for’
Click on the ‘SAVE’ button > printer will be added and enable the switch for ‘Receipt’. ( add a printer for receipt ) 
You can take a sample print by clicking on the ‘SAMPLE PRINT’ button.