Here's a list of keyboard shortcuts for the Mac app:

Projects: ⌘ + Shift + A 
Create Project: ⌘ + N

Dashboard: ⌘ + D
Styleguide: ⌘ + G  
Preview screen in larger window: Screen + Space bar  

Jump to Next Screen: →
Jump to Previous Screen: ←
Jump to Screen: ⌘ + J  

Create a new Section from selection: ⌃ + ⌘ + N
Collapse all Sections: ⌃ + ⌘ + ↑
Expand all Sections: ⌃ + ⌘ + ↓  

Edit name of Screen: ⌘ + R
Delete Screen: ⌘ + Backspace  
Search screen: ⌘ + F
Manage tags: ⌘ + T

Zoom In: ⌘ + +
Zoom Out: ⌘ + -  
Actual Size: ⌘ + 0
Zoom to Fit: ⌘ + 1
Zoom to Selection: ⌘ + 2  

Show/hide screen grid: ⌥ + ⌘ + G  
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