Tutorial Step 5: Edit the Work Week
Switch to calendar view 
. You can move or resize the blocks to adjust the working hours for the project.
. You can move or resize the blocks to adjust the working hours for the project. Drag a block to move it, or drag the edge of a block to resize it. Double-click and drag in an empty area to create a new block, or select a block and press the Delete key to get rid of it. The text inside each block updates to reflect the changes you make.
Here is a work week of 6 PM to 9 PM, 5 days a week. To get to this schedule from the default schedule, you could first select one of the two existing blocks and press the Delete key, then drag the edges of the remaining block to change its start and end times.
If, like in this case, your average work day is no longer 8 hours, you should visit the Project Unit Coversions inspector 
and change the hours per day setting, so that your task durations will make sense.
and change the hours per day setting, so that your task durations will make sense.