When placing dimensions, left or right extension lines are turned off and on when placing a string of dimensions.
To accomplish this the left or right extension line is toggled on or off as needed during placement of a string of dimensions.
This works fine unless the Change Dimension command is used later. When using this command, all of the extension lines after the first one placed are turned on or off according to the Right Extension toggle status regardless of how they were originally placed.
The"change dimension extension toggle" key-in will allow you to change the extension lines with out having to use the Change Dimension tool.