The user interface is a little tricky (improved in v7.5.2)
Here is how I do it, with the Property sheet docked on the right side of the screen.
Click in the body of your code snippet, then try to use the drop down in the Property sheet. You may or may not see an item to select. Click in a different place in your code snippet - for example, try clicking on the method definition line, then try the property sheet drop-down again.
Repeat until you see "Sage.Platfor.Orm.Entities.CodeSnippetHeader", select that - the Property sheet will change and you will see a Property item for "AssemblyReferences", click that and off you go.
Todd Hardin
SalesLogix Professional Services Group
