Eclipse Tabs – Changing Editor Tab Width in Eclipse 3.5

No.

Bug 58945: CTabFolder should support multi row and vertical style options, opened since 2004! (other bugs exist on the same topic)
(Update Feb. 2017: it seems to be assigned, with Oxygen 4.7 as target!
Thank you specializt for mentioning that in the comments)

CTRL+F6 is one workaround for now.

Other "workarounds" are listed in this thread:

• turn on the "close editors automatically" option (preferences > General > editors), which will close editors automatically when the limit is reached an a new editor is to be opened.
• make use of multiple windows each with a set of editors for areas you are editing or browsing or searching
• CTRL+Shift+W to close all tabs quickly

As mention by Big Chair in the comments:

Someone made a workaround here: "Eclipse multiple tab rows"

Wes explains:

I've discovered that while it is true that you cannot have multiple rows of tabs for the same code-space, it is possible to have multiple rows of tabs showing on your window at the same time:

To accomplish this, simply drag a tab up to your title bar and release. It will create another row of tabs.