Can someone tell me if there is a way to switch all my RoboHelp HTML files to the doctype 5 automatically?
Is there an option in RoboHelp to select the HTML version? Or any other way to achieve this except for manual editing of the HTML code.
No way to convert to HTML5 doctype. You'll need to manually find and replace the doctypes in your output. Note that WebHelp uses both HTML 4.01 Frameset and XHTML 1.0 transitions. But for valid output, you may need to make some more modifications to the output.
The question is: Why would you want to set the HTML 5 doctype? What would that bring that the XHTML 1.0 doctype can't? Also, IE (except maybe v9) don't support HTML5 so you can't use the HTML5 tags like canvas if you want to support older browsers.
You can use Tools > Options > General > "Convert RoboHelp converted topics to HTML" to convert your output to HTML 4.01 instead of XHTML 1.0 transitional. But that's as far as it goes.
Thank you so much.