Please excuse my newbie ignorance, I've only done 5 classes of a 12 class course and the exercises have been simple 2D engineering drawings so far. The course has now reached the stage where we can introduce our own work and I want to do a plan of a slab paved patio. For practical purposes I may be barking up the wrong tree here but my question is: If I draw a grid of construction lines with a lineweight that represents the width of the mortar joints between the slabs, can I then snap to the outer edges of the intersections of these grid lines to draw the intervening slabs, rather than snapping to the center of the gridlines? Regards,