On my laptop, sometimes an application’s throws up a pop-up menu or form that is too long to fit on the screen. If the form has no scroll-bar to get to the bottom of the form, which often has an OK button that needs to be pressed to move on, it is a very frustrating experience.
I’ve had this problem with cinelerra, a powerful opensource video editor as well as with the android SDK. The solution is to press ALT+F7, which will allow you to ‘grab’ the window and manually adjust it upwards and allow you to click the OK button and move on!
You can also grab a window not only on its title bar, but everywhere when holding Alt.