I spend a lot of time framing a photo in my viewfinder (or on my screen, as is the case when I shoot with my phone).  Sometimes it is difficult to know what to align parallel with the sides of the frame. Today’s photo contains a white line at an angle and a horizontal blue line. The blue line is parallel with the line that defines the sidewalk squares. The yellow line seems to cause visual imbalance. In fact the yellow line is a part of the curb that tapers to parking-lot level to allow easy access for handicapped individuals. It also tapers when viewed from above. Therefore, the orange area appears to be slightly trapezoidal instead of rectangular.

Tilt