How to Change Position Default Settings (% of Composition)

[antncook]

I use Shift + Command + P as a shortcut to bring up position so I can accurately align elements and etc. The Units default to Pixels when I'd prefer it to default to % of Composition. Where are the settings to change Position Units default settings? 

[Rick Gerard]

There is no way to change the Position property to a percentage of the composition size. You could add an Expression Point control to a layer and then use this expression to use percentages to position the layer. It would work no matter what the comp size. You should be able to figure out the math.

p = effect("Point Control")("Point")/100;
xSize = thisComp.width * p[0];
ySize = thisComp.height * p[1];
[xSize, ySize]