How to include existing files to project?

In Qt Creator (1.3.0), how do I add an already existing UI file to a project? If I Open it, the file opens, but is not added to the project.

Found it.
In the Project tree, right-click to get the menu entry "Add existing Files..."
A bit obscure, but works for me.

Quote:

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Originally Posted by Asperamanca

Found it.
In the Project tree, right-click to get the menu entry "Add existing Files..."
A bit obscure, but works for me.

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You can edit the .pro file, too.