Text Radius

The Text Radius (DTRAD attribute) is a signed distance (in Sheet units) that defines the radial position of the dimension text origin from the centre or circumference (according to the DTFLAG setting) of the dimensioned object. In the latter case, DTRA= 0 (the default value) means that the text origin is positioned at the 2D projection of the circumference of the object dimensioned.

If the text origin lies outside the circumference then the text is justified towards the centre of the circle. If the text lies inside the circumference then the text is centre justified unless the DSTYL is LEADER. In this last case, the justification is towards the circumference.

Text radius can be negative. For DTFLAG CIRCUMFERENCE, a negative value means inside the circumference. For DTFLAG CENTRE, a negative value places the text on the opposite side of the centre to its usual position, equivalent to reversing DDEG with a positive DTRA value.