This functionality is new as of version 4.0.
Comments and Alerts can be added to the Purchase Order via the 'Purchase Order Details' screen → 'Purchase Order Log' tab.
In order for an Alert Type to appear in the 'Alert Type' drop-down list on the 'Add Purchase Order Comment / Alert' dialog, it must include the 'Purchase Order' Alert Category.
To Add Comments and/or Alerts to a Purchase Order:
Navigate to the 'Purchase Order Details' screen → 'Purchase Order Log' tab.
Click the ‘Add’ button.
Type the Comment/Alert text in the 'Comment' field.
Select the 'Alert' checkbox to create an Alert.
Select an Alert Type from the 'Alert Type' dropdown list.
Refer to Configure Purchase Order Alert Types.
