To change settings for a project, in the Project tab, click on Project Settings in the File section.
You can change settings such as the title of the project, the primary output, and localization. You can also manage a To Do List by clicking on the Manage… button and adding the required to do actions.
In the Index section, you can choose to either add new keywords to the project index file (HHK) or save as individual topic files (HTM). Select the Binary Index option if you want to combine indexes from multiple CHM files.