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Some days ago my Eclipse was working fine and a +/- appeared in every block that could be collapsed (functions, classes, etc.)... but now it does appear, and I don't know how to activate that feature again.
It's Eclipse Helios, running on a Gentoo Linux box.
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you can use Ctrl+Shift+Minus to collapse all of them and then use Ctrl+Alt+Plus to open one of that recursively.
Update for Eclipse Mars on Windows 10 (using inside "Search View"): Numpad * - expands all in the selected folder, Numpad + - expands ONE level below the selected folder, Numpad - - collapses previous expanded folder (or if ALL was expanded then next underlying level along WITH the expanded folder down below) in the ...
Preferences -> C++ -> Editor -> Folding ?
Make a right click in the editor window and go to preferences there, then only the editor-relevant section of the preferences dialog will appear. This works for JDT, CDT etc...
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