Programs drawing their windows beyond my 15in screen boundaries

This doesnt work well with PrntScrn generated screenshot window. You have to combine the keys in this order instead:

  1. Right click the top window bar
  2. Choose window
  3. Unmaximize
  4. Repeat step 1 and 2
  5. Select Move with Keyboard (Resize with keyboard does not work)
  6. Press Keyboard arrow up to shift the whole window upwards to show the "save" button. ( Unfortunately you end up loosing access to the top window bar: but at least you can now save your screenshot)