2017

The minimum number of vertices for a polygon depends on the type of interpolation used. A polygon
should have at least three vertices when using Linear interpolation, or four when using Cardinal or
Bspline interpolation. The maximum number of vertices is 255. A polygon can be concave.
4 To create an open-ended polygon, click Opened Shape.
5 Position the cursor at one vertex of the polygon, and click to anchor that point on the image.
6 Release the cursor and move it to where you want the next vertex of the polygon. You can continue
to adjust the positioning of the next vertex until you press down on the cursor. Press to anchor the
point on the image.
7 Repeat steps 4 and 5 for each vertex.
8 To close the polygon, press anywhere outside the canvas.
The polygon is drawn on the image.
Rubber Banding
Rubber banding is the default setting for drawing polygons and lines. This means that a vertex is added to
the polygon only when you press and release the cursor.
To draw a polygon with multiple vertices, disable the Rubber Banding button in the Setup menu. When you
drag the cursor while drawing a polygon or line, vertices are drawn on the image.
(a) Rubber Banding button
Drawing Regular Polygons
Draw regular polygons using the Sides field and the E key. A polygon can have three or more sides. This
enables you to draw a triangle or a square based on the centre point of the object.
To draw a regular polygon:
1 In the Graphics menu, click Add.
2 Select the Polygon tool in the Object Tools window.
3 Enter the number of sides for the polygon in the Sides field.
4 Press E.
5 Position the cursor over the image and press down.
This is the centre of the polygon.
6 Drag the cursor away from the centre point. The polygon is drawn on the image. You can continue to
adjust the size of the polygon as long as you press down on the cursor.
7 When the polygon is the correct size, release the cursor.
The polygon is drawn on the image.
922 | Chapter 20 Painting