Click on the three dots next to the task you wish to start within Workflow Manager. Click Start Task

Note that skipped tasks will be cancelled or deleted if planned. Workflow Manager will update to show only the remaining tasks:

Click on the three dots next to the task you wish to change. Click on Edit Task

To change the due date, select the Calendar icon, pick the new date, and click Save

As you change the task Duration notice the Due Date automatically updates, skipping weekends. Click Save