Centre Mark

Add a centre mark to a circle or arc.

This function allows you to add a centre mark to an arc or circle.

You cannot add a centre mark to an ellipse.

The centre mark is drawn as two lines and uses the current line style and colour.

Procedure

1. You are prompted to indicate the circle or arc to which you want to add a centre mark:

Indicate circle or arc

The current line style and colour will be used to draw the centre mark.

2. Move the cursor to the arc or circle.

3. Press [Enter] or click to add the centre mark.

4. The function repeats and you can add the centre mark to any arcs or circles.

5. Right-click on the drawing area and select Quit. Alternatively, press [Esc].