To Create an Ordinate Dimension | AutoCAD 2019 | Autodesk ...
Ordinate dimensions measure the perpendicular distances from an origin point called the datum, such as a hole in a part. The datum is established by the current location of the UCS origin. Move the UCS origin to the datum. Click Annotate tabDimensions panelDimension. Find At the prompt, enter o (Ordinate). If you do not want jogs in the ordinate leaders, turn on Ortho mode [F8].
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