Go to Window / Playblast / Options

Time Range: Start/End
Viewer: fcheck
Display Size: From Render Globals
Scale: 1.00

Then choose Window / Playblast and you will get a window like the attached picture.

From there you can save the image. You can do things like change your background in the Camera attributes or change the wireframe colors to suit your tastes. You can also not render the grid (as I have done) or not render the axis.

Have fun.