Shortcut Keys For The Develop Module in Lightroom 2.x

Adobe has gone nuts! In Lightroom there is a key combination for everything. There is even a key combination for taking the dog out and another one for feeding the cat but only if you have the left panel enabled with... in the develop module...

As far as I have figured out there are 235 key combinations in Lightroom! And these Lightroom key combinations do different things depending on the context.

Task Windows Mac
Convert to grayscale V V
Auto tone Ctrl + U Command + U
Auto white balance Ctrl + Shift + U Command + Shift + U
Edit in Photoshop Ctrl + E Command + E
Copy/paste Develop settings Ctrl + Shift + C / Ctrl + Shift + V Command + Shift + C / Command + Shift + V
Paste settings from previous photo Ctrl + Alt + V Command + Option + V
Copy After settings to Before Ctrl + Alt + Shift + Left Arrow Command + Option + Shift + Left Arrow
Copy Before settings to After Ctrl + Alt + Shift + Right Arrow Command + Option + Shift + Right Arrow
Swap Before and After settings Ctrl + Alt + Shift + Up Arrow Command + Option + Shift + Up Arrow
Increase/decrease selected slider in increments of 1 Up Arrow / Down Arrow Up Arrow / Down Arrow
Increase/decrease selected slider in increments of 10 Shift + Up Arrow / Shift + Down Arrow Shift + Up Arrow / Shift + Down Arrow
Reset a slider Double-click slider name Double-click slider name
Reset a group of sliders Alt-click group name Option-click group name
Reset all settings Ctrl + Shift + R Command + Shift + R
Sync settings Ctrl + Shift + S Command + Shift + S
Sync settings bypassing Synchronize Settings dialog box Ctrl + Alt + S Command + Option + S
Toggle Auto Sync Ctrl-click Sync button Command-click Sync button
Select White Balance tool (from any module) W W
Select the Crop tool (from any module) R R
Constrain aspect ratio when Crop tool is selected A A
Crop to same aspect ratio as previous crop S S
Crop from center of photo Alt-drag Option-drag
Cycle Crop grid overlay O O
Reset crop Ctrl + Alt + R Command + Option + R
Select the Spot Removal tool N N
Select the Adjustment Brush tool (from any module) K K
Select the Graduated Filter tool M M
Increase/decrease brush size ] / [ ] / [
Increase/decrease brush feathering Shift + ] / Shift + [ Shift + ] / Shift + [
Switch between local adjustment brush A and B / /
Temporarily switch from brush A or B to Eraser Alt-drag Option-drag
Paint a horizontal or vertical line Shift-drag Shift-drag
Increase/decrease Amount Drag adjustment pin right/left Drag adjustment pin right/left
Show/hide local adjustment pin H H
Show/hide local adjustment mask overlay O O
Cycle local adjustment mask overlay colors Shift + O Shift + O
Select Targeted Adjustment tool to apply a Tone Curve adjustment Ctrl + Alt + Shift + T Command + Option + Shift + T
Select Targeted Adjustment tool to apply a Hue adjustment Ctrl + Alt + Shift + H Command + Option + Shift + H
Select Targeted Adjustment tool to apply a Saturation adjustment Ctrl + Alt + Shift + S Command + Option + Shift + S
Select Targeted Adjustment tool to apply a Luminance adjustment Ctrl + Alt + Shift + L Command + Option + Shift + L
Select Targeted Adjustment tool to apply a Grayscale Mix adjustment Ctrl + Alt + Shift + G Command + Option + Shift + G
Deselect Targeted Adjustment tool Ctrl + Alt + Shift + N Command + Option + Shift + N
Show clipping J J
Rotate photo right (clockwise) Ctrl + ] Command + ]
Rotate photo left (counterclockwise) Ctrl + [ Command + [
Toggle between Loupe and 1:1 Zoom preview Spacebar or Z Spacebar or Z
Zoom in / zoom out Ctrl + = / Ctrl + - Command + = / Command + -
Play impromptu slide show Ctrl + Enter Command + Return
View Before and After left/right Y Y
View Before and After top/bottom Alt + Y Option + Y
View Before and After in a split screen Shift + Y Shift + Y
View Before only \ \
Cycle info overlay I I
Show/hide info overlay Ctrl + I Command + I
Create a new snapshot Ctrl + N Command + N
Create a new preset Ctrl + Shift + N Command + Shift + N
Create a new preset folder Ctrl + Alt + N Command + Option + N

I think that I have all the 235 Lightroom key combinations that work in Lightroom 2.x. The list is by functionality: