Q:
How do I change the Actual Start Date of a task?
A:
Drag on the left-hand edge of the task on the gantt, as illustrated below. A panel will open to track your changes. OR you can fill in a date for the Work Start in the spreadsheet (see that cell below.) Before you change it, the Work Start date in the actual will be grey, indicating that it is copying the baseline value.
NOTE: If you try to change the actual start of the first task in the project to something earlier, you will get a warning panel saying you can't start the task before the project start.
Valid for 1.5
Valid for 1.6
Valid for 1.7