Question: How to cut out the hole for fabric and hinges.
Options:
Measure one inch in from every edge and mark it.  Cut all four sides of this so that there is a large hole and save the piece you remove.
Measure one inch in from every edge and mark it.  Cut around four sides of this so that there is a small hole and save the piece you remove.
Answer: Measure one inch in from every edge and mark it.  Cut all four sides of this so that there is a large hole and save the piece you remove.