Cloud9IDE is based on Ace* Ace does not yet support code folding I think. It was discussed as possible feature but not yet implemented as far as I know: http:

Cloud9IDE is based on Ace* Ace does not yet support code folding I think. It was discussed as possible feature but not yet implemented as far as I know: http://groups.google.com/group/cloud9-ide/browse_thread/thread/89c115d98e2d8a7b http://groups.google.com/group/cloud9-ide/browse_thread/thre... *an open source project based on the work from the people at Cloud9IDE (ajax.org) and Mozilla (Bespin / SkyWriter