C++ Eclipse Galileo getting it to display line numbers - how?

EDIT: jldupont's suggestion (see below) did the trick

Window -> Preferences -> General -> Editors -> Text Editors -> Show line numbers

I just installed Eclipse Galileo (first time) and am programing in C++ and couldn't get the editor to display the line numbers...开发者_如何学JAVA When i Googled it I got these directions:

Go to Window -> Preferences -> Editor -> Appearance and check Show line numbers

But when I follow those directions - there is no "Show Line Numbers" check box? where can i get this 'plug-in' of enable this feature? or does Eclipse have line numbers?

note: i have CDT installed

Window -> Preferences -> General -> Editors -> Text Editors -> Show line numbers

I have "Show Line Numbers" in the context menu when I right-click on the left-hand side of the editor pane.