The Grid Angle dialog box is used to change the angle of the grid. It is displayed by selecting Grid|Specify Grid Angle… or Grid|Rotate Grid Around Grid Origin The user then enters an angle (in degrees) in the edit box and clicks the OK button to change the angle of the grid as viewed from the top. The grid will be rotated around either its center or the grid origin depending on which command was used to display the dialog box. The grid angle is measured counterclockwise from the X-axis. The axis of rotation is always vertical. For all models, the grid origin as at the position of the first row and column boundaries. The grid origin is the upper left corner for MODFLOW models and the lower left corner for PHAST models.
See also: Specifying a Grid with Numbers and Editing the Grid.