the “natrual value”and the “Pruning”

There are two question by following:

First: I want to know the option's natrual value,the the mathematica tell me that it is "Automatic".When I try to get it like this:

In[22]:= Clear["*"]
AbsoluteOptions[Limit[Abs[x - 1], x -> 1], Direction]
Out[23]= AbsoluteOptions[0, Direction]
`

It's a pity.

Second: About the "Pruning",I have some confusion.Let me take a look the picture.

(you can get the picture easily by seaching the "Pruning" in the documents)

It was not my intention.I want to removes 60 pixels from each branch.But actrually the removing is 15 per branch.This is the "Wolfram Documents" description.

• Welcome to Mathematica.SE! May I suggest that you split this into two separate questions? They are very different. – Verbeia Apr 22 '15 at 7:31
• i'm sorry to do that.it's my first time to here.and this two questions are so short.i'll pay a attention to what you suggest.thk. – yode Apr 22 '15 at 8:04