How to link to an external PDF file from a topic of my help file

To link to an external PDF file from your HTML Help (CHM) file, or from a Web Help system:

1. You should upload the PDF documents to your web server.
2. Use hyperlinks of the "Web Page" type that allow you to link to an external document by its URL address.

1.) To link to an external URL from a topic:

You can insert a hyperlink of the "Web Page" type.

For more details, you can visit:

https://www.helpsmith.com/webhelp/topics/hyperlinks.htm

2.) To link to an external URL from the Table of Contents:

You can add a TOC item of the "Web Page" type.

For more details, you can visit:

https://www.helpsmith.com/webhelp/topics/help-topics.htm

You should upload the PDF documents to your web server.

I will try this solution, thanks.