centremark (D, C, R) marks one centre, sized to a feature of radius R.

centremark (D) with no centre marks every circle and arc already in the drawing. A drawing of a bolt circle or a bore pattern carries dozens, and marking them one at a time is how one gets missed — which a checker will notice and a machinist will not.

The marks take the current layer, line type and colour, so the usual order is to set 'CENTER' and the centre-line layer first and then call this once.

See also: diam, radius, draw.linetype

Source Code: draw.Drawing