What does command shift I do in Photoshop?

Selection Keyboard Shortcuts!

1. Select All: Command A.
2. Select all Opaque Pixels: Command-click on Layer Thumbnail.
3. Inverse: Shift Command I.
4. Deselect: Command D.
5. Restore Last Selection: Command Shift D.
6. Feather Selection: Shift F6.

Selection Keyboard Shortcuts!

1. Select All: Command A.
2. Select all Opaque Pixels: Command-click on Layer Thumbnail.
3. Inverse: Shift Command I.
4. Deselect: Command D.
5. Restore Last Selection: Command Shift D.
6. Feather Selection: Shift F6.

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