LG g3 screen shot

[since2004]

Press power button and down volume on back to take screen shot.

***Edited to add labels***

[teresab3st]

You can also get a screen shot from your top pull down menu and choose Quick Memo +. It give you the option of putting it in your gallery or in the quick memo app when you hit save. Hitting the buttons on the back of the phine can sometimes be awkward:-)