OK...now im with you....
Right, first of all, click View>Show Track Automation. without doing this in the first place your not gonna get anywhere
Once youve done this, each track in the arrange window will zoom veritcally, and youll see an option window in it. (in the picture you sent, its the field with 'volume' or 'pan' shown)
If you click and hold down the mouse on this bar, it gives you options of automating volume, pan etc....
Theres another option will appear just to the left of this which will probably say 'Read' in green (as it does in your pic). If you change this to 'touch' (it'll go yellow) this means the fader will be moved up and down in real time, and not actually 'written' to the track (if you hit 'write' it will write the settings permanantely to the track.)
Then to add automation, simply left clik on the wav in the arrange window, and a 'node' will appear....you can move this up and down to your hearts content, or add as many as you want. By right clicking an dragging, you can draw lines/curves.. Logic also allows you to modify the lines connecting nodes, and turn them into curves...
You can add as maany automations to a single track as you want by clicking on the little arrow, it opens up another automation line (as shown in ur pic...)
The trouble with logic is, you can do
everything you could possibly need, but its a b*rstard to find....
Good Luck..