For more complex calculations based on other fields in the table, you can double click on the field name to add it as a variable in the appropriate part of the equation. When editing is complete, go back to the table pull down menu. While editing table content may be adequate in some situations, you may find that what you really need to do requires adding a new Field or Record to the table. Tools for editing table structure are available in the Edit pull down menu. Add record adds an empty record to the bottom of a table.
Delete record removes the currently selected record from the table.
Add field adds an empty field to the right side of the table. Delete field removes the selected field from the table. All of these tools are straightforward except for Add field. When you add a field, it is necessary to set some parameters for the field. Take some time to choose how you will set up your table because these options cannot be edited once they are set.