Option to flip drop shadow vertical or horizontal in layer effects panel. Drop shadow groups idea.
The drop shadow effect in the layer effects panel should have an option to flip the drop shadow either vertical or horizontal (and be able to provide a pivot point for that flip...not always just center), as well as an option to make a "cast" shadow.
It would also be good if one drop shadow could contain several drop shadows. That way you could change the parameters on the parent drop shadow and some of those settings would carry down to the other shadows, such as color, or opacity percentage which could be locked to different percentage pre-formulations (for example 4 drop shadows @ 75%, 55%, 35%, 18%; 3 drop shadows @ 75%, 50%, 25%, or a completely Custom Formulation with up to 6 drop shadows including the Parent). I know you can already do multiple drop shadows in the layer effects panel. This is a suggestion to control them together as a group. If you changed 75% to 80% in one of the groups, the other drop shadows would add 5% opacity to their numbers as well. You would also be able to change the opacity, color, etc. of a drop shadow independently of the others by clicking a checkbox to "Ungroup" the shadows. They can then be grouped back together after those changes have been made.
