There are several ways to change the estimated duration of tasks in projects:

• Using the Tasks screen
• Using the Edit Task screen
• Using the Gantt screen
• Using the Staff Planner or Resource Planner

Changing the Duration of a Task using the Tasks Screen

To change the duration of a task using the Tasks screen, follow these steps:

1. Go to the Projects screen by clicking Projects on the left sidebar.
2. Find the project you wish to work on and click on it to enter the project.
3. Click on Tasks on the left sidebar to enter the Tasks screen.
4. On the Tasks screen, ensure you are displaying the Estimated Duration column on the Tasks screen.
5. Double-click on a task's estimated duration cell and enter the new duration value.
6. You can also copy duration cell values and paste them into other task duration cells, and you can fill down cells to neighboring cells by dragging the right corner of a duration cell.

Changing the Duration of a Task using the Edit Task Screen

To change the duration of a task using the Edit Task screen, follow these steps:

1. Go to the Projects screen by clicking Projects on the left sidebar.
2. Find the project you wish to work on and click on it to enter the project.
3. Click on Tasks or Gantt on the left sidebar to enter the Tasks view or Gantt view of the project.
4. Select a task and click the Edit Task button on the Tasks screen toolbar or Gantt screen toolbar.
5. This will display the Edit Task screen.
6. Change the Estimated Duration of the task and click OK to save your change.

Changing the Duration of a Task using the Gantt Screen

To change the duration of a task using the Gantt screen, follow these steps:

1. Go to the Projects screen by clicking Projects on the left sidebar.
2. Find the project you wish to work on and click on it to enter the project.
3. Click on Gantt on the left sidebar to enter the Gantt screen of the project.
4. Select a task in the Gantt screen's timeline and drag either end of the task to lengthen the task.

Changing the Duration of a Task using the Staff Planner or Resource Planner

To change the duration of a task using the Staff Planner or Resource Planner, follow these steps:

1. Click on Planner on the left sidebar and select Staff Planner or Resource Planner..
2. Select a task that you wish to change and drag either end of the task along the Planner's cells to the lengthen the task's duration.
3. The task will be automatically updated with the new start date, finish date and duration.

Tip: The tooltip is updated as you drag the task so you can see the start date, finish date and duration of the task.

Tip: Whilst resizing a task's duration with your mouse, the start date and finish date will be blocked to the cell's boundary (either day, week, month or year).  If you wish to have more finer control and choose the exact day or time for your task, then hold down the SHIFT key whilst dragging and the blocking is turned off so you can choose your preferred day or time within a cell.