Re: Closing projects so they don't appear in the Timeline

A quick way is to create a folder in the Project Library (e.g. ClientX) and drag them in there. I sometimes have 20 version of a project, So I make a folder for all timelines that are "done for ClientX" or "prep only". This way they don´t appear in the Project Browser all the time, only when I step into the folder.

If you want to have them somewhere else totally (and this works with events too) go to the Finder. Find the Final Cut Projects directory and drag the Projects somewhere else. Once they are out of that directory FCPX doesn´t see them.
I have in every project a FCPEventparked and a FCPProjectparked directory. Once I don´t need them or want to hide them I drag the event and projects in there. Takes a second (when they are dragged within the same drive!!!).

There is also an app EventManagerX, but I don´t use it, because it only makes sense on one machine and I edit on 2 or have to share external drives a lot.