Dimension Angle from X-Axis

Used to dimension the angle between a line, side of a shape, or segment of a line string and the view x-axis.

The (Angle) Units, which sets whether the degree measurement or the length is dimensioned, is set in the Dimension Styles dialog (Units tab).

Setting	Description
Style	Displays the active dimension style. The drop-down list box allows you to select other available dimension styles.
Dimension Styles	Opens the Dimension Styles dialog, which is used to control settings for dimensioning.
Reset Style	Restores settings to the default dimension style settings.
Association	If on, snapping to the element being dimensioned causes an association point to be created. If off, no associations are created.

Key-in: DIMCREATE ANGULAR Y