Show and Hide logic only works on web forms. Make sure you are in the "Web View" for the Show/Hide options selection to be visible.
Then, click on the element you want to show or hide. When the Field Properties window opens, click the "Show / Hide Item" under "SKIP LOGIC RULES". In the window that opens, have that selected field either hide or show, depending upon the action that you define in this window.
I hope this helps,