The Feedback pane is intended to help the user to act on errors and warning messages that are revealed after the project is validated. It is not possible to submit a project to the ALMA archive if there are any errors (warnings are allowed) and so it is extremely important to validate before submission and, preferably, regularly during a project's creation. The Feedback pane appears automatically when the validation command is executed, even if it has previously been hidden.
Upon validation, the feedback can be inspected in three tabs: Validation, Validation History and Log. The former is the one that is usually used and gives a row listing of the errors and warnings found during the most recent validation. The location of each problem is indicated by a cross on a red background in the Project tree and double-clicking on the row will cause the location to be displayed in the Editors pane.