ctrl+w?

ctrl+alt+ →/↓/←/↑

Thanks Bingo, I knew it must be there somewhere!

@cxbii - Ctrl+W just closes FF windows.

Super+S also can call up.
You can view all the shortcut keys in the "System Settings-->Keyboard" module.

That Super+S is cool!  Out of habit I never even try the Super-key anymore - probably 'cos of my 6 years exclusively using Linux!  Many thanks tuhaihe.

Super+S，show the workspace
Super+W，Expose app windows
Super+Tab，switch apps in 3D

Haha, that Super+Tab is super-cool!

Which has me wondering if this is code from Gnome3.  I know that Deepin has it's own desktop (ie. it's not Gnome3) - but is it a fork of Gnome3?  I read somewhere that since Deepin uses Compiz, it cannot be a fork.  Or maybe this is just a Compiz effect.  I rushed over to my laptop where I still have Ubuntu 10.04 installed to see if its Compiz had that same 3D effect - it didn't.  

Still, the DDE has a lot of Gnome3 similaraties, so there must be a lot of 'recycled' code in there. Although it's ages since I had anything to do with Gnome3 - I tried it out initially when Fedora15 came out, hated it, gave it another go with Fedora16, and swore never again! - so I don't know what kind of effects it's capable of.