A typical problem in automating web based applications is finding and interacting with elements that are inside different iframes.
Qentinel Pace by default finds elements/texts etc. inside all frames. You don't need to do anything special to find an element.
However, if you wish to do so, you can override this default behavior and tell Qentinel Pace that you want to control specific frame only. This can be done by setting configuration DefaultDocument to False (SetConfig DefaultDocument False). After this you can switch to a frame using UseFrame Paceword; all subsequent Pacewords/commands will be directed to this specific frame.
Remember to use Paceword UsePage when you are done controlling one specific frame.