Adobe Photoshop CS3 Keys for using the Curves dialog box keyboard shortcuts keys

Shortcut                                                            Command
Ctrl M	Open the Curves dialog box in Adobe Photoshop
Ctrl + Tab	Select next point on the curve
Shft + Ctrl + Tab	Select the previous point on the curve
Ctrl-click on the points	Select multiple points on the curve
Ctrl + D	Deselect a point
Select a point and press Delete	To delete a point on the curve
Arrow keys	Move the selected point 1 unit
Shft + Arrow keys	Move the selected point 10 units
Alt-drag black/white point sliders	Display highlights and shadows that will be clipped in Adobe Photoshop
Ctrl-click the image	Set a point to the composite curve
Shft + Ctrl-click the image	Set a point to the channel curves
Alt-click the field	Toggle grid size