1. To access the Calendar window, click 
in the toolbar, or choose Window ® Calendar.
2. In the Calendar window double-click a cell to open the Activity window. The activity's Start Time and End Time correspond to the time of the selected cell.
3. Enter the required data for the activity.
4. Choose Add in the Activity window.
To create an activity with a time period of more than one cell, click and hold the left mouse button in the first cell, drag the mouse and release it in the last cell. Press Enter to open the Activity window, displaying the selected time period.