The attached example is a picture browser with a simple navigation system, and a preview portal. (I know it's ugly but it's just a technique demonstration ;)
I could have used a container field to highlight the active portal element, but conditional formatting makes our life simpler :)
I created a an empty (well, actually it has a space char in it) text element, resized it to th
e portal element size, then applied the following conditional formatting to it:
(Set Formulat to: If the related ID equals to the Current id, then apply a Fill color)
After this I put this text under the portal picture field, and send it backward.
I attached the demo file which you can download to analyze the technique.
You can download it here. (right click, save as)
Be sure to check out: http://crm.fm as well :)
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