If you've already generated your responses the easiest way to do this is when reviewing the form in the answer drawer you can use the Chat Mini beta function. Chat Mini allows you to chat to the AI about that particular answer and therefore ask the AI to shorten the answer to a particular word limit. To get the best possible results ensure instructions are concise and provide a maximum number of allowed words or characters. If you've not uploaded your form yet pop the word limit in the instructions on upload.
To view a video demonstration, click here