Depending on the type of gazebo and canopy, there are a few ways to repair it. If the pole is broken, you can use a metal file to file down the jagged edges until they're smooth. Then, use a epoxy resin (or any strong adhesive) to glue the two pieces back together. If there are any cracks in the canopy, you can use a sealant or fabric glue to fix them. Be sure to let the adhesive dry completely before using the gazebo again.

You can fix a canopy by replacing the old gazebo pole with a new one. Simply remove the old pole and replace it with the new one. Make sure that the new pole is securely in place before putting the canopy back on top.