This functionality is new as of version 4.0.
In order for an Alert Type to appear in the 'Alert Type' drop-down list on the 'Add Inventory Transfer Comment / Alert' dialog, it must include the 'Inventory Transfer' Alert Category.
Refer to Configure Inventory Transfer Alert Types.
To Add Comments and/or Alerts to an Inventory Transfer Request:
Navigate to the 'Inventory Transfer Request' screen → 'Transfer 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 Inventory Transfer Alert Types.
The alerts that are created on this tab are ‘Inventory Transfer Alerts’, which will appear on screens that display Inventory Transfer Alerts.