How do I prevent Keynote textbox from moving upward?

Hello community. Is it possible to lock a text box position in Apple Keynote while keeping the text editable? One of the issues I have with Apple Keynote is that when I type in a text box and do carriage returns, the text box moves upward. I just want it to stay in place and have the text box expand downward. I can't find a setting for this.

Keynote 12.2.1