Please add the ability to disable the snapping constraints on offset offset lines. The Shift key is used in other functions to temporarily disable automatic constraints.
When editing offset offset lines in an explode state, the dragging nodes tend to snap to snap to normal (and possibly other conditions). Many times the sensitivity of this constraint is too sensitive to allow the user to make the minor adjustments needed to get a good looking drawing. The work around I have to use is to make a larger adjustment at one end, move the other end to where I want it and move the first end back where it will again snap into position relative to the other end.
There are several other issues with offset lines to fix. But those have been covered in other Ideas.