In this two-part lesson, I will explain how to use these new features for perspective rulers.
Please refer to the following articles to learn about the basic operations for perspective rulers.
 Adding a vanishing point
With the [Perspective ruler] tool, you can add more than four vanishing points on the perspective ruler that you made.
You can make graphics with slanted edges, such as the roof of a house, match up with the perspective.
Make a perspective ruler from the [Layer] menu. Here, I made a three-point perspective ruler.
Select [Figure] > [Create ruler] > [Perspective ruler], and check that on the [Tool Property] palette, [Content of process] is set to [Add vanishing point].
Drag the cursor across the canvas to create the guide line.
Drag the cursor across the canvas again to create another guide line. The point where these two lines intersect will become the vanishing point.
In the image below, two vanishing points have been set for the roof.
 Using the [Perspective ruler] tool to make a perspective ruler.
You can use the [Perspective ruler] tool to make a perspective ruler.
I will explain using the below image as an example.
I want to make two vanishing points, so I choose two straight lines to act as a guideline for each vanishing point. I chose these four lines in the example.
Select the [Perspective ruler] tool and check that [Content of process] is set to [Add vanishing point].
Now I draw the guide line along these straight lines.
Once I draw the two straight lines, a vanishing point is created. This is called a one-point perspective ruler.
Now I use the [Perspective ruler] tool to draw the guide line along the other two straight lines.
Once I’ve added these guide lines, another vanishing point appears. The straight line connecting the two vanishing points is eye level. This is called a two-point perspective ruler.
If you want to make the eye level horizontal, use the [Object] tool and hold the Shift key while dragging the handle of the eye level, or right click the eye level to display a popup menu, then select [Horizontalize eye level].
If you add another vanishing point, it will become a three-point perspective ruler.
NOTE: Adding a slanted vanishing point to a two-point perspective ruler
If you use the [Perspective ruler] tool to add another vanishing point to a two-point perspective ruler, it will become a three-point perspective ruler under the initial settings.
To add a slanted vanishing point while keeping it as a two-point perspective ruler, go to the [Tool Property] palette and uncheck [Change perspective drawing method], then add the vanishing point.
In the image below, a vanishing point has been added at a slanted angle.
 Editing with the perspective ruler tool
With the [Perspective ruler] tool, you can edit the perspective ruler as well as add vanishing points.
You can change the settings on the [Tool Property] palette under [Content of process].
① Delete vanishing point: Delete vanishing points by clicking the vanishing point or a guide line connected to it.
② Add guide: You can add extra lines extending from the vanishing point.
Drag the cursor across the canvas to create the guide line from the vanishing point in that direction.
Drag in different directions to connect the guide line to different vanishing points.
Once the guide line is connected to the desired vanishing point, stop dragging in order to set the guide line.
③ Delete guide: Click a guide line to delete it. If you click the vanishing point, one guide line will be deleted on each click.
④ Fix vanishing point: This fixes the position of the vanishing point.
Once the position of a vanishing point is fixed, you will not be able to change its position using the [Object] tool.
However, vanishing points on top of the eye level will be fixed at the eye level. So, if you change the eye level, these vanishing points will move with it.
In addition, if you move the entire perspective ruler, fixed vanishing points will move too.
⑤ Infinitize: Click a guide line to delete its vanishing point and make the guide lines connected to it extend infinitely.
In Part 2, I’ll explain how to use 3D layers with perspective rulers.