If there is a specific set of enzymes that you want to use repeatedly, you can create a custom enzyme set. There are two ways to do this:
1. In the Find Restriction Sites interface, click Advanced and select the enzymes you want in your set. Then click Save Selected Enzymes and give the set a name.
or
2. Go to New Enzyme Set under Cloning or File → New. Give your set a name and click OK. This will create a new, empty enzyme set document. To add enzymes to the set, click Add Enzymes and select the ones you want from the list.
New enzyme sets are created as documents with the 
icon. These are created in whatever folder you are working in, but all enzyme sets in your database are available in the Candidate Enzymes drop down list, in the Find Restriction Sites interface.