Last modified: 2014-08-05 20:33:49 UTC
If the user has a high-resolution widescreen monitor or a multi monitor setting, it does not make sense if the user has to scroll up and down to revisit the preview while not using the available screen space. In this case, the user need the preview on the left (or right) side rather than above or below the edit field. Further, a popup-preview would provide additional freedom in window arrangement. Note: This can also combined with live preview, so the non-experienced user can see in real time which effect his edits have. Specially if the currently edited paragraph appears in the (almost) same visual height as the preview of the paragraph.
This seems to have been implemented in WikiEditor extension at some point, but presumably is incomplete as it's not being used currently. See bug 28750, bug 22142 which make references to it.
(In reply to comment #1) > This seems to have been implemented in WikiEditor extension at some point, but > presumably is incomplete as it's not being used currently. See bug 28750, bug > 22142 which make references to it. That's right, WikiEditor has a proof-of-concept implementation of side-by-side preview (well, it's really a preview tab: the preview isn't displayed side by side but you can switch between wikitext, preview and diff modes using tabs at the top of the edit box. But it essentially addresses the same problem) but it was never polished to acceptable quality. IIRC the preview tab works reasonably well, but the diff tab had some issues, and both had issues concerning new page creations. The code is still there, though, and probably still works as well as it did when it was abandoned (about a year and a half ago), so anyone who's interested could jump right in and polish it.
Adding 'design' keyword.
Either the bugs mentioned in comment 1 should be fixed (which makes this request invalid), or you'd wait for VisualEditor which will provide this. You can test VisualEditor already on English Wikipedia, see https://en.wikipedia.org/wiki/Wikipedia:VisualEditor
(In reply to Andre Klapper from comment #4) > or you'd wait for VisualEditor which will provide this. VisualEditor has been around for some time now.