You can also rotate a ROI as follows: Draw a shape, then right-click in the view and select Complete shape type. Click the mouse when you are ready to accept the rectangle. Press and hold the Shift key and drag the previewed rectangle to the end of the object. These two points determine the angle at which the rectangle will be drawn. With polygons, you can use a shortcut to draw a rectangle at an angle: Click two vertices to define one side of the rectangle. For polygons or polylines, press the Backspace key to delete the last vertex drawn. When adding any shape or point, you can press the Delete key to clear it, or right-click and select Clear shape_type. Until you "accept" the points, they appear as crosshairs. Until you "accept" the shape, it appears translucent and you can edit its size or vertices, move it, or rotate it. Rectangle or Ellipse ROIs: Click and drag to draw the rectangle or ellipse.Until you "accept" the shape, it appears translucent and you can edit its size or vertices, or move it. To complete the shape, press the Enter key once, or right-click and select Complete shape_type.
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