ViewSonic M1 VS17337 - About the aspect ratio; Aspect Ratio Explanations

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About the aspect ratio
In the picture below, the black portions are inactive areas and the white portions are active
areas. OSD menus can be displayed on those unused black areas.
1. Auto: Proportional scaling of an image to t the
projector’s natural resolution in its horizontal
width. This is suitable where the incoming image
is neither in 4:3 nor 16:9 aspect ratios but where
you want to make most use of the screen without
altering the image’s aspect ratio.
Image 16:10
Image 16:9
2. 4:3: Scales a picture so that it is displayed in the
center of the screen with a 4:3 aspect ratio. This
is most suitable for 4:3 pictures such as those for
computer monitors, standard denition TV, and
4:3 aspect DVD movies as these can be displayed
without aspect alteration.
Image 4:3
3. 16:9: Scales a picture so that it is displayed
in the center of the screen with a 16:9 aspect
ratio. This is most suitable for images which are
already in a 16:9 aspect such as high denition
TV because as these can be displayed without
aspect alteration.
Image 16:9