How to make Eclipse's "find text in working set" command use a default working set?

As a user new to Eclipse, I am trying to use the Find Text in Working Set 开发者_运维问答command to mimic Visual Studio's Find in Files command. It works fine, except that every time I have to tell it which working set to use. And I only have one working set!

How can I get this command to remember the working set from one invocation to the next?

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If am not wrong, short-cut is "CTRL+SHIFT+R"

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The File Search command does what I need: it can search all the files (or a subset), and it remembers my working set.