We do not have an UI option to turn this back to DW CC 2015 behavior. However this can be done by making a small edit in one of the JS file. Please be warned that by making this change you are going back to older Preview in Browser functionality when invoked from all menus within Dw. Please copy this file "PIB_Dynamic.js" onto a separate folder on the desktop or some place as a backup to be able to restore it back just in case something goes wrong. If you are on windows and have installed at the standard location, then Dw would be installed into the folder "C:\Program Files\Adobe\Adobe Dreamweaver CC 2017". On Mac it should be "/Applications/Adobe Dreamweaver CC 2017". Under this folder browse to configuration\Menus\MM and open the file PIB_Dynamic.js. Search for the text "dw.browseDocument" and change the last argument to true to make the final code look like dw.browseDocument(dw.getDocumentPath('document'),theBrowser, "-1"/*help argument*/, false /*use temp doc*/, true); With this, though the menu would read as Real time preview, it would be mapped back to the older preview in browser and the keyboard shortcut F12 would work as in earlier releases.
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