I would like to change size of a few elements, but not in the center of each of them but to the left bottom side. How to do that? I can do that only by pre-composing. But I don't want to do that every time for that little thing. For better undertstanding I recorded a movie where I show this problem.
Move the anchor points of each layer to the bottom left corner using the Anchor Point (Pan Behind) tool or add a null to the comp, position it where you want the scale to start from, parent all the layers you want to scale to the null and scale the null.