One of Celtx’s first three new “Learning Templates” is a tool pack for script development: “The Writer’s Development Kit”. I can highly recommend it, not only because of its ridiculously low price, but also because I wrote it.(*)
There has been a lot of confusion about the terms logline, synopsis, and treatment so I try to shed some light on those as well as give you guidance on how to write them.
I designed this small learning package for writers with projects in development and I believe most beginning screenwriters would benefit from using it.

Here is the link again: https://tsd.im/kit.
Should you need a more in-depth discussion on Loglines and Synopses, check out my training packs.
Enjoy!
– Karel Segers
(*) As Celtx is no longer offering the Kit as a standalone learning package, all the links in this article have been replaced with direct, free download links. Enjoy!