Oh...right. Btw in MZ they changed it and it saves picture in 1:1 ratio.
Just to add to that a bit, that is only the case if the map is not larger than 32 x 32, because the editor apparently can't output an image that is higher or wider than 1536 pixels. Once I learned this, I went ahead and ported Orange Mapshot
The Link for the Plugin isn't available anymore. -.-"
But I found it on another Site. Only I don't know how this works with this Plugin.
As I don't know what other site you got it from, I'll go ahead and recommend that you grab it straight from Hudell's GitHub
to be on the safe side. Usage instructions are already described in the thread that ShadowDragon linked to you, but I'll go ahead and quote the relevant part:
This is a very simple plugin. Just activate it on your plugin manager, set the keyCode param to the code of the key you want to use as a trigger (Default is printscreen - code 44), run the game and press the key when you want to take a mapshot.
So if you haven't changed any settings, just playtest your game and go to the map that you want to capture, and press the "Print Scrn" button on your keyboard. Off the top of my head, I don't remember whether or not the default setting will also include events in the image. You probably don't want to capture the events for parallax mapping, so if it's showing the events as well, you might want to go into the plugin settings and change that.