The Glowforge bed image is smaller than my material

Ok. I thank you all for your patience and explanations. I have read a lot in these forums and I still get confused at times. What you are saying makes sense.

So here is what I want to make sure I am doing correctly.

I have a new cutting board in the machine (14x11), the tray is removed, I have one of these risers I printed and assembled underneath the cutting board. I am using the -.50 riser.

https://community.glowforge.com/t/various-height-bed-risers

This is what the GF presents me with when I close the door.

This is very close to a test rectangle that I created to see where the boundaries are for the 14x11 piece of material. I understand that it doesn’t quite get to 11" so I’m ok with that. It’s not getting the 14" width of the board. So is this because the measurements are off? I have not entered any measurements into the GF at all. The top of this cutting board is 1.61" from the bottom of the unit. So it should be well within the range correct?

The height of my tray is 1.35". If I subtract this from the 1.61 I end up with .26. This is the number I need to enter into the GF for an “uncertified” material correct?

Thank you all again.
Doug