https://forums.autodesk.com/t5/autocad-forum/dimension-line-extends-past-extension-lines/m-p/5477934#M342670 <P>Those "extensions" are halfway part of the Block, like the length of arrowheads<EM> plus the tails</EM> on them when they actually <EM>are</EM> arrowheads [adding another arrow size amount],&nbsp;when they point inward from outside the extension lines, and they are determined by a combination of the arrow size in the Dimension Style definition and the Dimension Scale setting.&nbsp; If you don't want them at all, you can use a Block definition without that Line, but then when the arrowheads are&nbsp;inside the extension lines,&nbsp;you will have a <EM>gap</EM> of the arrowhead size between the extension line / tick and the end of the dimension line.&nbsp; You could<EM> reduce the size</EM> of the extensions by making the diagonal tick mark part larger in relation to the one-unit-long Line part in the Block definition, and using a smaller arrow size in the Dimension Style definition.</P> Thu, 22 Jan 2015 04:40:16 GMT Kent1Cooper 2015-01-22T04:40:16Z