Rhino resolution option not listed in properties

I have Rhino 5 and Flamingo nxt 5.5. I would like to change the resolution. Online help directs me to File > Properties > Flamingo > Resolution. I checked in documents and Rhino options. There is no “resolution” option. I also checked in the render sections. No such option.

Need help to increase the resolution or size or pixels.
Thank you.

From top menu,
Flamingo nXt > Control Panel
Change the tab to “Render” on the Flamingo nXt control panel dialog box.
You can change rendering size to modify the rendering resolution menu.

Does that work?