Help menu reference
Help|Calculation Assistant
The Calculation Assistant command leads you through a set of steps to use in adding a calculation to the markbook.
When using the Assistant choose the Back button at any time if you want to change the choices made so far. The last step of the assistant shows a summary of the choices made and has a Finish button, which must be chosen to finalise the calculation and add it to the markbook.
Choosing Cancel at any time stops the assistant before any changes are made to the markbook.