Adjust PMI Locations

Hi all,

I have two questions:

First, how do I adjust the length of extension lines for datums? By clicking and dragging, I can move the datum up and down, and bend the leader line, but I can't slide the datum left and right. Is this a bug or design?

Second, do PMI dimensions need to be defined independently within every model view they are to be used in? Or, can I copy/paste or click/drag, or some other technique, to copy pre-existing PMI dimensions from one Model View to another? For example, in the image below, I want to copy Center Mark (1) from "Front_PMI" to "Front". I think I figured this one out, RMB>Display>In Views...>Select the Views you want it to display in.

Also, supposing I can share PMI dimensions between Model Views, can the same PMI dimension have a different position for each view? Maybe in one view I want it moved to a different part of the model than the other view. 

Thank you in advance for your time and assistance,

Alex