Ah, the great challenge of 'can it be done'. Although Rick gave the sensible answer, I couldn't resist tinkering with this a bit to see whether I could get it to work with RoboHelp. Can you create a second frame in the output to show other content? Yes. Is it simple? No. But really much simpler than I imagined 🙂 Will it be useful? Probably not. I think you're better of by embedding a syntax highligher and using dropdown texts. But nonetheless, here goes nothing; PoC Output: Multi Window HTML5 test PoC Project: http://robohelp.wvanweelden.eu/poc/html5_multi_window/Multi Window HTML5 test.zip I created a blank skin containing only the topic view and an additional iframe. I removed all the other widgets to avoid problems with the layouts. In the topic, I added three links: one regular link, one link to a topic in te project and a link to an external site. In the link, type the name of the iframe you want to load the content: Generate the output. Of course, going this route requires more research, but it seems that it can be done. To get back to your question as to what it would involve: A custom Screen Layout that includes the additional iFrame. It must be tested whether the RH scripts (for search, TOC, etc.) will work when there are two iframes in the skin. Links that should open in the iframe have to be amened as above. Also, I have no idea whether you can set these frame options in FM Markers. Perhaps you can, but I'll believe it when I see it.
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