I’m sorry for the trouble when trying to set up a project in the app. It looks like you’ve already received some great information from our other community members. Thanks folks!
To build on what they’ve shared so far, your Glowforge bed can accommodate materials measuring 18 x 20.4” (45.72 x 51.816 cm). It has a maximum printable area of approximately 11″ (27.94 cm) deep and 19.5″ (49.53 cm) wide, and it’s reduced somewhat when the laser operates at high speed, as it can take space for the laser to decelerate.
This means not all of the bed is displayed, or available to be printed on, so there will always be about an inch of space on the left and top of the material. This material can be reused as scrap later for small pieces. For example, a lot of customers use small pieces of scrap to print these pins available in the free laser design section: https://community.glowforge.com/t/honeycomb-bed-holdown-pins/18652
Please let our team know if this information helps!