auto search through highlighting in eclipse

Sometimes when I click the cursor in a variable or method it will highlight it and highlight all other occurrences.

I quite like this but it only seems to work when it wants to :(

开发者_如何转开发How can i make it work manually so that it will always happen when given the chance instead of in just some source files ?

There is a button on your toolbar. It looks like a pen. Its tooltip is "Toggle mark occurrences" and the hot key is Alt-Shift-O.

maybe you don´t have marked all types in settigns (Preferences > Java > Editor > Mark Occurrences...)