These are often asked questions regarding setting up a new FileMaker database system. "How can I limit when the user can enter data into the field?" Or, the alternative, "Once the user enters data, how can I make sure they don't change it unless I want them to?"
Both of these types of questions can be answered using a variety of methods. The core to understanding their answers is that there's really only only two methods for limiting field access. One is controlling the display of the field and the other is truly limiting access to the field data itself.
Using the knowledge in this video you should be able to come up with a method which fits your exact situation. The video walks through the use of the various options which FileMaker provides for limiting access to a field. If you'd like to know which options you should use to control access, then give this video a view.
Click the title or link to this article to view the video.