I'm not sure that I understand your question.
Every layer has a Position property and a Scale property. You don't need to add them.
If you're asking about how to _show_ the properties, then it's just a matter of clicking the triangle next to the layer name in the Timeline panel and then clicking the triangle next to the name of the property group. (The Position and Scale properties are in the Transform property group.)
See this page: "Layer properties in the Timeline panel"
Since you're new to After Effects, I strongly recommend that you start here:
My question was about this bullet from your link:
- To add a property or property group to the properties shown in the Timeline panel, hold Shift while pressing the shortcut key for the property or property group.
If the properties aren't showing and are "hidden" from your timeline/alyer palette, is there a way without shortcuts to add them back to the timeline pallette/layer?
Re: shortcuts... S for scale is intuitive, T for Opacity is not. I was wondering if there's a dropdown somewhere that has the property options?
There's no menu for showing and hiding properties in the Timeline panel. You can click the triangles next to property groups to expand and collapse them, and you can use the other tips in the page that I pointed to for showing and hiding various sets of properties. For a list of the shortcuts, go here.
Regarding 'T' not being intuitive: 'O' was taken by the shortcut for going to the Out point. 'T' is short for 'transparency'. Some people jokingly remember it as 'opaci-T'.
Thanks. It just struck me as odd that there's no "longcut" way to make it appear. I haven't run across that ever in other programs.
Also, way back in the day (After Effects v. 3.1 and prior?), the property was actually called "Transparency" instead of "Opacity". Then it was switched. Now I'm showing my greys, huh?
Also, if my memory serves me correctly, the Transform Properties Group used to be called Geometrics. Anyone else remember that?