2015

AutoCAD 2015: Complete Guide to What’s New
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When selecting an object to extend, it is clearly identified and temporarily extended.
The Lengthen tool also supports command preview. It has been further enhanced in AutoCAD 2015 to default to the last
lengthen option (delta, percent, total, dynamic) so you are no longer required to specify an option each time you launch the
command.
The Break tool displays the results of the Break operation prior to specifying the second break point.