I found a video on this item but I am confused: Are they using the grid on the cutting mat to determine width of the cuts or are they actually using the ruler for measurements?
http://www.youtube.com/watch?v=_k6ct_cilcQ
Reason I ask is I can't see if there is a starting edge on the cutting edge of the ruler. I use my rulers to determine width/length - I never use the grid on my cutting mat.
Confused.............