A WindowProxy object, which is basically a thin wrapper for the Window object representing the newly created window, and has all its features. Give each window a new window name. (url, WindowName). › Frames and windows. A bad page could open tons of popup windows with ads. So now most browsers try to block popups It is null for all windows except popups. open to reopen an existing window with name strWindowName: This functionality is not valid for all browsers and more with variable conditions. Firefox (). You can use Flip to switch between open windows. To do this, press and hold the Alt key on your keyboard, then press the Tab key. Continue pressing the Tab key. PyCharm hides all windows except the active editor. To close all opened tabs, select Window | Editor Tabs | Close All Tabs from the main. We'll teach you to differentiate the types of opening in aluminium windows and their advantages and disadvantages. · Types of opening · Turn or side hung: · Top. Opening new windows for your application. In an earlier tutorial we've already covered how to open dialog windows. On your Mac, many apps let you open documents in tabs instead of separate windows.