I'm running Windows 7 64 bit. I was using the grid format during on-air and I was having trouble getting the preview to be the active window whenever I do something else. For example, I had an informational window pop-up that had nothing to do with proclaim or the current task, so I closed the window, but then my arrow keys would not work to advance slides. I clicked in various places on the screen, but nothing worked until I clicked on the advance slide arrow, which took me to the next slide, but even though I now know that I have to click there, to get the arrow keys to work, I may not always want to display the next slide at that instant. Is there anything else I can do to restore arrow key function? This also happens when I perform some function in another window, such as my recording software.