You can define in MathGraph32 as many frames as desired.
To create a frame, use the tool or the menu Create - Frame.
If you want to create frame (O,I,J) simply click on O, I and J in that order.
It is possible to create a new figure with a frame.
For this use :
either menu New figure with - Frame without vector
either menu New figure with - Frame with vector
Different sorts of frame are available :
A frame can be created with grid and dots at integer coordinates.
When a new figure is created with a frame, radio boxes at the bottom of the dialog box allow the user to give scales to the axis.
A trigonometry scale is available to scale the x-axis with multiples of pi.
The scales on each half-axis can be moved with capture tool .
It is possible to add scales to the axis of a frame after the creation of the frame.
For this use menu item Modify - Add scale to frame.
Two possibilities :