This tool allows you to rotate a pattern or layer so it lays across an imaginary vertical or horizontal line.
If the Pivot Point and the Rotating Point are on the same plane as the Plane option, the layer will not move. For example, look at the image below. If you chose Vertical for the Plane, the layer would not rotate because these two points are alreadly vertical.
Also, if there is any text on a selected layer, it will likely move unpredictably and need to be removed.
Select the layer to align. Select the top layer to rotate the entire pattern.
Next, select a point that will serve as the pivot for rotation. It will stay in place and the rest of the geometry will pivot around it.
Select a point that will serve as the rotating point. This point will designate the amount of rotation applied to the layer.
You can rotate the pattern so the pivot and rotation point sits on the Horizontal plane or the Vertical plane. In other words, the imaginary line between the pivot and rotation points will be either horizontal or vertical after rotation.
You can choose to rotate the pattern Clockwise or Counter-Clockwise (Anti-Clockwise). This makes a big difference in the final outcome.
This is the final location after the above parameters were used. Notice that the text is not aligned.
This is the same pattern using the same settings, except the direction was set to Counter-Clockwise.