When using the mass update multiple values of a single metric of a sales agreement terms tab, the three actions that are available are: replace with, decrease by, and increase by. These actions allow the user to update the values of a metric across multiple periods and products in a sales agreement. For example, the user can replace the forecasted quantity of a product with a new value, or increase the discount percentage of a product by a certain amount. The other options, update with and multiply by, are not valid actions for mass update. References: Mass Update Account Forecast Action, Update Multiple Values in Advanced Account Forecasts