Toolbox
While Celtx comes with tons of tools, the Toolbox feature allows creation of customized tools (or perhaps more likely for most of us, downloading additional tools). To open the Toolbox, click on the wrench icon on the top toolbar of the main Celtx screen, as shown in the following screenshot:
The Toolbox dialog box that opens is empty as shown in the following screenshot:
Clicking on the Get Celtx Tools button opens up a page on the Celtx website offering a number of commercial tools for purchase. Want some free tools? Click on Utilities on the left of that webpage and the following screen appears:
To install, click on the tool desired, then restart Celtx.