There are many ways to take a screenshot on the nubia Z50 phone as well as several cool tips tricks and best hidden features to get a screenshot in the fastest way:
Google Assistant
Use Capture+ icon at notification bar
Use buttons
Use GooglePlay apps
Gesture
We know you're smart. Therefore, there will be no instructions like select the screen you want to capture or turn on your phone. No crap. Only the required information how to make a screenshot on the nubia Z50 phone.
Use buttons
The quickest way to take a screenshot is to use the buttons. Hold down the Volume Down and Power buttons and keep them pressed until you capture a screenshot. You can use this method to make a scroll screenshot.
Click to zoom in
If the main 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 slothful way is to use Google Assistant. Just say OK Google and then Take a screenshot. The phone will do everything for you.
Click to zoom in
How do I share my screenshots? Depending on the Android version and the custom shell, sending screenshots may differ. In lastest versions of Android (9 or 10), the smart menu will arise after you take a screenshot instantly. There you need to choose the appropriate icon for sharing. Or just open the gallery app on your gadget.
Where does my screenshot go on? If you can't find the screenshots you took, don't lose heart. The folders where the phone saves screenshots and regular 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.
Metro
AT&T
TracFone
Simple Mobile
Sprint
Virgin mobile
T-Mobile
Cricket Wireless
Verizon Wireless
nubia Z50 has a screen resolution 1080 x 2400 pixels. So the screenshot will be the same size. The file size will be 0.3 MB, so count how much space you need in your phone's memory or on your SD card.
Some images or video from this post may not exactly match your phone model. But, they have typical parts that will help you get the desired result.