Specific shapes can be created from points created by clicking the mouse at the desired locations. These shapes could theoretically also be created by modifying basic shapes, but the mouse click method makes it easier to create more complex shapes.
Although this function is initiated in the menu displayed by drawing a rectangle with the mouse, the coordinates of the drawn rectangle are not relevant. Only the coordinates of the marked points are used.
First, a message will appear with instructions for entering the points. When entering the last point, always press the Ctrl key while clicking the mouse. The mouse cursor will take on a special form and the points you have already entered will be shown in red.
If you hold the Shift key while moving the mouse, points will be restricted to mbox-column and mbox-row coordinates in 500 intervals.
Lines

This example was created with six normal mouse clicks and a final click (with Ctrl held).
Curves

This example was created with twelve normal mouse clicks and a final click (with Ctrl held).
Hint: If you want to create a quarter-circle using a Bézier curve, the control point must be set a distance of radius * tan(30°) = radius * 0.5773 from the main point. This is not the case in the example above, which means that the curves are not uniform. |
Polygon

This example was created with seven normal mouse clicks and a final click (with Ctrl held). The surface area of the shape can be filled with color.