Template is a html file that contains some special tags. Template can contain images, js, css files, etc. Template files must be stored in Project Folder or its subfolder.
Template is very useful to help you create uniform style help files. But it's not necessary when creating a help file.
Add prebuilt template.
WinCHM has several prebuilt templates that can be used immediately after adding.
Apply a template.
To use a template, you must apply it at first.
Right-click a template name in File list pane, select Set as HTML help template or Set as web help template on the popup menu. You can also set these in Project setting.