You can set the editors display options in this panel.
- Aspect Ratio
Display Aspect for this image. Does not affect rendering.
- Repeat Image
Duplicate the image until it is repeated to fill the main view.
- Pixel Coordinates
Display UV coordinates in pixels rather than from 0.0 to 1.0
- Display As
Display white edges with black outline.
Display dashed black-white edges.
Display black edges.
Display white edges.
Display faces over the image.
Show results of modifiers in the UV display.
- UV Opacity
Opacity of the above UV overlays.
Shows how much of a difference there is between UV coordinates and 3D coordinates. Blue means low distortion, while Red means high distortion. Choose to display the distortion of Angles or the Area.