In this case where you want to link up 3 different sites with text or image with a primary site , you would need to hyperlink site with text on page.
Talking about the plan, it would be :
- Create a rectangle with text or image for 3 different sites and hyperlink them with respective urls.
- Once user clicks on the text or image , he would land to another site.
- For other site , you can create a header section which would be on top of the page with site name and other site links.
If you are referring to scroll function, such as on click to link white bar would scroll , you can create this but it wont be a different site but on the same page.
With compositions you can use the label area for adding links or anchor points on page , but again this wont change site url in browser as it would be same page not a different site.
Thanks,
Sanjit