Yes, this is possible. Simply click on step "3. Outline" and then click on the page, under which you would like an interactive page to be. Click on the icon "New Page".

 

A new window will open displaying all available interactive pages. You will be able to choose the particular page you require and also have the opportunity to rename it.

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Example:

 

Here is an example for a multiple use of the forum function in a "Music School" website:

Guitar Course:
- Guitar Forum
Piano Hours:
- Piano Forum
Choir Samples:
- Choir Forum

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You can edit repeatedly used interactive functions in the same way you edit single ones