There are 6 simple ways to take a screenshot on the OnePlus 9 Pro phone as well as several best tips tricks and cool hidden features to rapidly get a screenshot:
Screenshot Capture shortcut icon
Install screenshot app from Google Play
Built-in app
Three fingers swipe on screen
Google Assistant
Use buttons
We understand that you are smart. Therefore, there will be no instructions such as select the screen you want to save or turn on your device. No crap. Exclusively the essential information how to make a screenshot on the OnePlus 9 Pro phone.
Use buttons
To take a screenshot is to use the buttons. You can simultaneously press the Volume Down and Power buttons and keep them pressed until the screenshot is captured. You can also use this method to make a scroll screenshot.
Click to zoom in
If the first way to take a screenshot not work and you can't find picture let's go further.
Use apps
You can use additional screenshot apps which are very much in Google Play: Screen Master, Screenshot touch, Private Screenshots, Screenshot Easy, Screenshot Pro etc... All these apps have instructions on how to use them to make a screenshot and save the picture.
Google Assistant
The slothful option is to use Google Assistant. Just say OK Google and then Take a screenshot. The phone will do everything for you.
Three-finger swipe
Just swipe three fingers down the screen to get a screenshot. The place of swipe is not crucial. This way is applied in OxygenOS.
Click to zoom in
Long screenshot
To take a long screenshot, just tap on the relevant icon. It will appear after you have taken a usual screenshot. This method can also be called to make a scrolling screenshot.
Click to zoom in
Use Capture icon
Another option is to use phone's built-in capabilities. Swipe down on the screen to open the notification bar. Find the screenshot icon (shortcut) and click on it to make a picture. It's done. You got the picture. How do I share my screenshots? Depending on the Android version and the built-in shell, sending screenshots may differ. In recent versions of Android (9 or 10), the quick actions menu will arise after you take a screenshot instantly. There you need to select the appropriate icon for sharing. Or just open the gallery app on your phone.
Where are screenshots stored? If you can't find the screenshots you made, don't lose heart. The folders where the phone saves screenshots and usual photo may be different. Again, it all depends on custom shells. A pure Android throws pictures into the gallery (DCIM). Other shells can save screenshots to a separate folder for your usability.
These methods work with gadgets of all operators.
Sprint
T-Mobile
Virgin mobile
Cricket Wireless
TracFone
Simple Mobile
AT&T
Verizon Wireless
Metro
Your gadget has a screen resolution 1440 x 3200 pixels. So the screenshot will be the same size. And the file will take up 0.5 MB of space in the built-in memory of the phone or on the microSD card.
The video or images in this post may not exactly match your phone model. But, they have typical details that will help you get the desired result.