use the ¶ button to add this character into your expression to force line breaks:
Dear " & CLIENTNAME & "," & ¶ & "Thank you for calling our office on " & DATEOFCALL & "." & ¶
THANK! Do you have a recommendation for some good filemaker books that has these types of tips? I'm hoping you don't say, "it's right in the usermanual." If you do, I missed that class :)
There are a number of resources available. I can't honestly recommend any one of them as the one that works best for one developer isn't the best option for another. I also haven't made a detail study of them due to being an "old fileMaker hand" that has been using the product since before the time it was a relational database.
You can research FileMaker books on a site like Amazon. If you read the reader reviews, you might get a better idea as to which one will work best for you.