just reactived my v17.04.01.03 and it is there. Dimensions/Linear/Dim.Style/Suffix Do you have the latest update?
This is why I have versions X3 to v18 on this machine (soon to be semi-retired) so I can answer questions to other local users who are on different versions.
Roger Donaldson AIA CSI CDT NCARB abUsing Datacad since 1986, ver 23.00.01.02 (SE) http://www.RogerDonaldsonArchitect.com
Made sure I had latest update but still cannot find it in the dcadwin.ini file. What category is it under? I did not see anything that related to dimensioning.