Grid lines on the decal design

Any way to get them grid lines toggled on as they help immensely when doing designs. If not I’ll just have to buy a huge van, paint it white, then put my own grid lines on it. Make the decal. then save it from there. I would prefer not to do all this mucking around though. (forgive me for not knowing. The last paint I did was for forza 4.)

If you click the right thumb button the decal editor it will change from light to dark background and also have a grid version.
Otherwise create your own and stamp to fill the screen.