VSys supports three kinds of assignments:
By default, VSys hides assignments in the past and those from projects other than the one currently opened. To show those, click on the Show past or Show other projects links (where applicable). In the example above, the Show past link has already been clicked, switching it to Hide past and showing past assignments.
To cancel all future assignments or assignments for a specific range of dates, click on the Cancel... link. Note that this affects all assignments in all projects.
Right-clicking on an assignment brings up options to: