I cannot get the damn snapshot feature to 

1) work worth a damn 

2) calibrate said snapshot feature

Is there an image correction feature on my phone that might be causing issues?  I don’t have A4 paper so I tried to tape a couple of pieces of printer paper down. The laser doesn’t mark the printer paper very darkly. I actually ran the laser twice over the paper to get darker markings thinking that might help. I have run through the calibration process over two dozen times and it still won’t take. What am I doing wrong? I need to make this work so I can do batch filling so I don’t have to frame out every single item!