Yep. With the Gantt chart active, show details to split the screen.
Click in the lower half and display the task Usage View. Task usage shows all resources for the selected task in the top window pane.
Select the task you want to edit in the top pane, then edit the hours per day in the Task Usage View.
Note: you need to adjust the timescale in the top pane to show day by day.
Rod Gill
The one and only Project VBA Book
Rod Gill Project Management