Here is a list of new shortcuts that were introduced with the Lightroom 4 Beta.
The Library Module
• Command + Shift + M (Mac) | Control + Shift + M displays the Email Photo dialog.
The Develop Module
• “S” toggles Soft Proofing on and off.
• Shift + S toggles the destination gamut warning on and off.
The Map Module
• Plus/minus ( +, – ) zooms in/out.
• Option (Mac) / Alt (Win) + drag to zoom in on the map.
• Delete (Mac) | Backspace (Win) deletes GPS coordinates.
• Command + Delete (Mac) | Control + Backspace (Win) deletes all Location metadata.
• Command + K (Mac) | Control + K (Win) locks markers.
• Command + F (Mac) | Control + F (Win) highlights the Search Map field.
• Command (Mac) / Control (Win) Left / Right arrow move from previous/next track log.
• “I” toggles the Map information overlay.
• “\” (backslash) toggles Location filter bar at the top of the map.
• “O” toggles Saved Location overlay.
Map Style shortcuts:
• Command + 1 (Mac) | Control + 1 (Win) displays hybrid view.
• Command + 2 (Mac) | Control + 2 (Win) displays Roadmap view.
• Command + 3 (Mac) | Control + 3 (Win) displays Satellite view.
• Command + 4 (Mac) | Control + 4 (Win) displays Terrain view.
• Command + 5 (Mac) | Control + 5 (Win) displays Light view.
• Command + 6 (Mac) | Control + 6 (Win) displays Dark view.
The Book Module
• Left/right arrow keys move between pages (or spreads depending on view).
• Shift + left/right arrow keys moves to the first or last page.
• Plus/minus ( +, – ) increases/decreases thumbnail size.
Viewing Pages
• Command + E (Mac) | Control + E (Win) views Multiple Pages.
• Command + R (Mac) | Control + R (Win) views Spread.
• Command + T (Mac) | Control + T (Win) views Single Page.
• Command + U (Mac) | Control + U (Win) zooms single page. Or, use Command + plus/minus ( +, – ) (Mac) | Control + plus/minus ( +, – ) (Win)
Making Selections
• Command + Option + A (Mac) | Control + Alt +A (Win) selects all text cells on page.
• Command + Option + Shift + A (Mac) | Control + Alt + Shift + A (Win) selects all photos on page.
Showing and Hiding Guides
• Command + Shift + G (Mac) | Control + Shift + G toggles all guides on and off.
• Command + Shift + J (Mac) | Control + Shift + J Page Bleed.
• Command + Shift + U (Mac) | Control + Shift + U Text Safe.
• Command + Shift + K (Mac) | Control + Shift + K Photo Cells.
Working with the Targeted Adjustment tool for Text
Drag left/right to decrease/increase size.
Drag up/down to decrease/increase leading.
Command -drag up /down (Mac) | Control -drag up /down (Win) increase/decrease Baseline Shift.
Command -drag left/right (Mac) | Control -drag left/right (Win) increase/decrease Tracking.
Working with Video
• Shift + I sets the in-point of a clip.
• Shift + O sets the out-point of a clip.
And finally, the following develop settings can be applied to video clips:
• White Balance
• Basic Tone – Exposure, Contrast, White Clipping, Black Clipping, Saturation and Vibrance
• Tone Curve
• Color Treatment (HSL)
• Black and White
• Split Toning
• Process Version and Calibration