Supplemental Info:
I normally display PM across two screens. The screens are not the same size or aspect ratio, but it works well enough for me. I generally display the contact sheet/lightbox of thumbnails across both screens.
I prefer to display the Preview image in such a way that the preview itself is on the left, larger screen, while the window stretches across to the right and onto the smaller, right screen. I have it set up so that the Info panel text and controls appear on the right screen so that the preview display of the image takes up as much room as possible on the larger left screen.
On my old Vista machine, the Info panel text and controls would consistently appear in this manner (on that part of the preview pane that I had dragged over to the right screen) whenever I opened a new preview. Now they are gone, although the entire preview window stretches into the right screen.
In fiddling around with this this morning, I noticed the following: If I launch a preview, the image appears as always on the left screen, while the entire preview window spills over onto the right screen, as I want it to do, so that the Info text panel will display on the right. Except that the panel does not display; there is only black gray space there (it displayed fine on the Vista machine). If I then hit the Window Maximize button on the preview pane, the preview reverts to the left screen only, and the Info text panel with text and controls appears on the right side of the left screen, as it is supposed to. If I then hit the middle Windows display button (the one with the two overlapping squares; I don't know what that one is called, but it is the one that allows me to drag and resize the window pane), the display reverts to my preferred set up, displaying the preview of the image on the left screen and, voila, displaying the Info panel text and controls in that portion of the window that I have dragged across to the right screen. B ut, if I close the preview pane and launch a new one, the Info text box is hidden again. Also, if I "maximize" the window from two screens to one, and the info text panel appears, and I then close the preview window in that configuration, and then launch a new preview, the Info text panel is hidden again.
Is there some simple setting that I am overlooking here?