The aesthetic principles of framing are mostly a matter of taste but here are some tips that will help your pictures look their best. The lines found in your pictures and framing can convey different meanings that are deeply rooted in our psyche.
Curved lines tend to imply femininity where straight lines can portray strength and simplicity.
Combinations of lines in your framing can strengthen or soften the overall result. Balance in pictures and framing is a visible harmony of shapes and distances. Very often the widths of borders around pictures can be varied to achieve different effects. Usually the bottom of a border is wider than the top and two sides. This can create a reassuring feeling.