Use this dialog box to modify, edit, and delete joins and calculations for a selected primary table (layer of features).
To create a new join, click New
Join.
To create a new calculation, first select the layer whose properties will be used for the calculation. Use Shift or Ctrl to select multiple layers. Then click New
Calculation.
Select the item to modify and click Edit. You can edit only one item at a time.
Select the items to delete and click Delete. Use Shift or Ctrl to select multiple layers.