custom Copilot on Squarespace website

I have created a custom Copilot to use on our public website. In testing it, I found a problem with both code object and embedding. The block for the Copilot response is equal to one line of text. When I increase the block size, it only increases the section where I type in my prompt. How can I increase the section with the Copilot answer to the prompt? I would greatly appreciate any help.