Quick use of Google search

As long as it's a cocoa program, you can choose some text and press Shift+command+l to quickly search Google. (Try it in Safari)

Fine-tune volume

shift+alt+ the volume Control key to fine-tune the volume.

Quick access to slides

Select multiple graphs and press Option+command+y to get you into full-screen slides. Of course, a picture is OK.

Quick use of Google search

As long as it's a cocoa program, you can choose some text and press Shift+command+l to quickly search Google. (Try it in Safari)