When the flag is displayed in a manner other than by being flown from a staff, it should be displayed flat, whether indoors or out.
Which Way Should A Flag Hang On A Wall. Brush up on the rest of your flag etiquette if you're hanging your flag vertically (like from a window or against a wall), the union portion with the stars should go on the observer's left. One big flag faux pas that people miss is that in displaying the flag from a wall or window, the union (the blue field with stars) should be on the observer's left side.
The Proper Way to Hang A US Flag From The Wall or Ceiling ... from img.hunkercdn.com
Brush up on the rest of your flag etiquette if you're hanging your flag vertically (like from a window or against a wall), the union portion with the stars should go on the observer's left. Flag if they are both hung on same flagpole? Whether you display the flag horizontally or vertically, make sure the union, or the field of blue with stars, is on top and to your left.
Obviously the best way to fly the flag is on a pole with the union up, but you can also fly it upside down—with one catch:
When displayed either horizontally or vertically against a wall, the union should be uppermost and to. However, a flag patch may be affixed to the uniform of military personnel. When the flag is displayed in a manner other than by being flown from a staff, it should be displayed flat, whether indoors or out. When the american flag is hung on the wall, the stars should be in the upper left corner, from the observer's point of view.
