Photoshop :: Timeline Bar Hide The Key Able Property

I am using Photoshop cs6 windows version. First of all, see this picture. 

Right now I am trying to animate layer masks which are attached to individual layer groups, but as you can see, the  deeper  layer nest goes, the harder it is to animate , because I can't read names of keyable property and I can't extend the property bar ,like After Effects,to read the full name of key able property  in Photoshop. Is there any way to avoid this problem? I really need to animate layer masks.