According to the information in the Introduction, Application Designer runs as a web application or as part of a web application inside a servlet engine.
If you have larger projects and consequently have a high number of layouts and adapter classes, then you want to structure your development activities in a better way. For this reason, a project management exists that you can use to separate your project's resources across so-called application projects.
An application project is represented in the file system by a single directory. It includes:
XML layout definitions.
HTML files which are generated from the layout definitions.
Required images or required "normal" HTML files.
Adapter classes.
Files holding the information on how to translate text IDs into readable words in a language-dependent way.
Help files.
You can (and should) arrange your application projects to be self-containing units.