When working with FileMaker Go 13, I click on a container field to capture a signature and the Import dialog pops out—usually. This works fine as long as I'm logged in with administrator or manager privileges. But when I log in as a low-level user, the field becomes active, but the Import dialog does not appear, which means it won't accept a signature. The Security settings show that the User has complete access to the field. So what's going on here?