Add option to generate image from full file not just what is visible. Especially on saving the file. 

I found that the auto generation of the image on save to be very confusing if it only generated the image from what was visible in the viewport. I think it's much more intuitive to generate the full image and save that automatically.  


...e with the visible text. I generally want it to generate the entire image on save. So added a new command for the full file.