SQL Developer 2.1 editor settings

In SQL Developer 2.1, when I single click on a pl/sql object in the navigation pane, a writable editor tab opens. How can I change this behavior so that it opens as read-only? I only want the pl/sql editor to be writable if explicitly selected. I could not find anything in the preferences for this.
Thanks, John

You can always make a suggestion on the SQL Developer Exchange, and/or vote on some of the existing read-only connection requests to add more weight for possible future implementation.
Regards,
K.

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