How to set default page in HTML help workshop

It's been a couple of years since I last used HTML Workshop and I don't have it installed anymore but I just checked out some old doc sources and there's the following entry in the .hhp-file:

[OPTIONS]
Default topic=index.html

I'm pretty sure there was some way to set this via the HHWS GUI, too.

Steps for setting the Default page from the HTML Help Workshop GUI:

• go to "Project" tab
• double-click any item in the "[OPTIONS]" list. Opens the "Options" window.
• select "General" tab
• select/write the file path and name in the "Default file:" combobox
• press OK