Showing off your maps, seeds, textures, etc requires you taking screenshots.
There are multiple ways to do it.
Press the ‘Power’ and the ‘Home’ button at the same time.
There are multiple ways, depending on your Android version. I f one method doesn’t work, try another.
Method 1- press and hold your ‘Power’ and ‘Volume Down’ button at the same time for 1-2 seconds
Method 2- press and hold the ‘Power’ button from 1-2 seconds until you get a new menu screen appear. You then just need to select ‘Take a Screenshot’.
Method4- If none of the of the methods above work, you’ll probably need an app. Find one you like here.