The OnePlus smartphone can send a wide variety of files, such as photos, documents or PDFs directly to a connected printer for immediate printing.
For this, it is sufficient if the devices are in the same WLAN network.

Note: In this manual we print any PDF file. The steps are for illustration purposes only. Other options are available.

Android 10 | OxygenOS 10.0
Step 1:  Choose a  PDF file
Step 2:  Open the  menu
Step 3:  Tap on  Print
Step 4:  Open the  menu
Step 5:  Choose an available  printer
Step 6:  Tap on  Print
  1. Choose a PDF file
  2. Open the menu
  3. Tap on Print
  4. Open the menu
  5. Choose an available printer
  6. Tap on Print

OnePlus Instructions