change pitch in vocal

I downloaded audacity but most of the effects I want to use can be selected because they are not available to use. Can you help me select pitch bend in the software?

Please state which version of Windows you are using,
and the exact three-section version of Audacity from “Help menu > About Audacity”.
Please give exact steps to reproduce the problem.

Note that effects are greyed out if there are no audio tracks in the project.