How to define my own constants?

1. Select menu: tools->options[Ctrl+P] to open options dialog, select the "Constants" tab.

2. Right click in the table, and you should see the popup menu.

3. Select "New Constant" and open a constant info dialog. Fill the constant name, value, and description(optional) in the dialog.

4. Press "Add" to save it.

5. System will check if the new constant is valid, and give you a message to help you fix the problems if it's not.

For more detail, please reference Options -> Constants.