Objects tangent to each other remain tangent if an object point rests at the point of tangency. Collinear lines stay collinear if they share an endpoint or they overlap. Each drawing must contain at least one vertical or horizontal line or dimension object. Horizontal and vertical lines stay that way. After the resolve is executed, any line drawn horizontal or vertical may shift up and down, move left and right, or change length, but will remain horizontal or vertical.
Connected points stay connected.
Any time the Drafting Assistant snaps the point of one object onto the point of another object the points connect. For example, lines that share an endpoint, regardless of position or angle, connect at that shared point. In addition if the center of a circle rests directly on the center of an arc and a dimension endpoint, all three points connect at that location. Parametrics cannot separate connected points. A equal to .546.