How to collapse blocks of code in Eclipse?

Question

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.

Answer 1

If you want folding an all your editors, I found you can enable Folding in

Preferences > Editors > Structured Text Editors

Enable Folding

Answer 2

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...

Answer 3

You can do Ctrl + Numpad_Divide to enable folding. Also if you right-click on the area where the +/- was supposed to be, you can see there is a folding option.

Answer 4

In CFEclipse: Preferences > CFEclipse > Editor > Code Folding > Initially Collapse column, you can uncheck to see all expanded when opening, or check all boxes to close all when opening a file.

Answer 5

I was using salesforce apex classes with Eclipse Neon 3.3 for Java.
I found an option "define folding region" on right click in the editor, I selected the block of code i wanted to collapse and selected this property for that code. Now I am seeing + and - symbol to expand and collapse that block of code

Answer 6

I assume you are using Java, but look under the settings for your particular language.

Under the Window menu, select Preferences.

Under Java->Editor->Folding. Select "Enable Folding".