Q1: Absolutely. I made my own MIL-STD-100 title blocks in sizes from
A to E with mating continuation sheets. I made them as both drawing
sheets and LibreCad library blocks. Loaded as a LC block keeps it
together when selecting and prevents inadvertent modification of the
elements. LC seems to ignore the title block when drawing inside it.
One must get very close or on top of a title block element to select
it. So selecting it by mistake or inadvertently being selected
outside the display area has not been a problem for me. I can still
fill in the text blocks in the title block without any problem. I
have my logo on them, but everything else is enterable - title,
date, sheet number, etc. The title block sheets are just saved
drawings with only the title block blocks instantiated. But I rarely
use them. I use the LC blocks on a new blank sheet. For continuation
sheets, I just copy an already filled out sheet to a different
filename with a sheet number in it. I generally use 1234-ss-vv.dxf,
where ss is the sheet number and vv is the version letter.
I still have LC configured to load the blank page to start as the
Q2: I think so, but I have never done it. Maybe someone else can
answer that one.
I don't know of a direct way to move absolute zero. You will have to move the contents. Select all and move from the point where new absolute zero shall be to 0,0. A special tool will just do this under the hood. It's probably an easy task to code such a tool, but it doesn't exist.