I had exactly the same problem another user (arghtype) is having here in this question's thread: How to enable duplicate tabs in Eclipse? (i.e. duplicate windows)
Although, it is only an answer post that doesn't necessarily achieve what we both want.
It recommends opening a separate, duplicated window, which is a bit resource heavy for what I need.
I wanted to formally ask this question in case anyone has the appropriate answer instead of a work-around or compromise, or we can open a feature request in the Eclipse work item tracker, and this way the answer and any history can become more apparent for this specific issue.
Also note I have tried the Menu options "Window" > "Show View" > "Other...", and then have selected the view/panel I wanted, with the current one in my UI both selected and unselected in different cases, and I still do not receive a duplicate panel.
I would also appreciate sources such as links to any documentation, or at least a screen shot with an answer, since I am very carefully not asking about the editor panel in the UI, which is commonly found as an issue on the internet.
To add, my specific case is using RTC 5.0.2 with Eclipse 4.2.2 (Juno), and I would like multiple "Work Items" panels open for my workflow. One for overall reference, one for current, immediate work, and any more for what have you.
Another related source I found that all seem to speak about the similar, more prevalent issue, specifically concerning only the editor tab/panel:
How do you split a window/view in Eclipse IDE?
Edit:
I have opened an Eclipse Bug/Enhancement request for the UI here: Bug 471001 - Allow user to create duplicate panels in perspective view.
We will see how it is handled. Either my version is too old to have this feature, or it does not exist, and could prospectively be added.