on creating new packages from existing parts it's somehow tricky to get all
pads and holes on the right coordinates - especially on items that use
different grids for the pads.
So I thought about a measuring aid to control the package layout.
Such a measuring aid could work that kind, that one uses a mouse-click to
fix the virtual measuring tape. Then on moving the mouse away, the distance
from that point is shown (both units, inch and mm).
The measuring could support 2 different modes, an so called ortho-mode,
where only the major difference between the coordinates is displayed
(either x2-x1 or y2-y1) and a free mode, where the right distance in any
direction is calculated and shown.
The measuring mode could be terminated with a mouse-click or i.e. by hitting