Hi, In my app I use a grid. Double click a row will open a window with another related grid. That window I configured modal: true. So the page is masked. Then in the second window on doubleclick a row again another new window (with modal: true) is openen with a form. A new mask is displayd. After using the form in the last window and close it the window will remove both masks, leaving the first window umasked. What I want is that the first mask isn't removed. It seems there is only 1 mask at a time possible. Is it possible to 'instantiate' a mask to a component?? Or is there another solution for this??