There are many ways to take a screenshot on the Nokia C21 phone and a few more best tips tricks and cool hidden features to rapidly get a screenshot:
Use Capture+ icon at notification bar
Gesture
Use buttons
Install screenshot app from Google Play
Google Assistant
We understand than you're smart. This is why there will be no teaching such as select the screen you want to capture or switch on your phone. No nonsense. Only the essential information how to make a screenshot on the Nokia C21 phone.
Use buttons
Probably the easiest way to take a screenshot is to use the buttons. Simultaneously press the Volume Down and Power buttons and keep them pressed until you capture a screenshot. You can use this method to screenshot with scroll.
Click to zoom in
If the first way to take a screenshot not work and you can't find image let's go further.
Use apps
You can use additional applications for screenshots which are very much in Google Play: Screenshot Pro, Private Screenshots, Screenshot touch, Screenshot Easy, Screen Master and more... They all have instructions on how to use them to make a screenshot and save the picture.
Google Assistant
The laziest option is to use Google Assistant. Just say OK Google and then Take a screenshot. The gadget will do all the work for you.
Click to zoom in
How can I share my screenshots? Depending on the Android version and the custom UI, sending screenshots may differ. In lastest versions of Android (9 or 10), the smart menu will appear after you take a screenshot instantly. There you need to choose the appropriate icon for sharing. Or just open the gallery app on your phone.
Where are my screenshots? If you can't find the screenshots you took, don't give up. The phone can save screenshots to different folders. Again, it all depends on custom shells. A pure Android throws pictures into the gallery (DCIM). Other shells can save screenshots to a different folder for your usability. These methods work with gadgets of all operators.
Sprint
AT&T
Verizon Wireless
Cricket Wireless
Virgin mobile
TracFone
Metro
Simple Mobile
T-Mobile
Nokia C21 has a screen resolution 720 x 1600 points. So the screenshot will be the same size. And the file size will be 0.1 megabytes, so calculate how much space you need in your phone's memory or on your microSD card.
The video or pictures in this manual may not exactly match your phone model. But, they have typical details that will help you get the required result.