How to remove the box created by "Insert comment box" in DrRacket?

After creating the comment box using "Insert / Insert comment box" in the REPL window of DrRacket, I cannot find a way to remove it or otherwise continue with my work. Everything I now type appears inside this box and is not evaluated. I cannot type before or after the box and I cannot delete the box.
Screenshot_2022-09-30_10-36-19

Try clicking the empty area below the box. Doing this should position the caret after the box, which allows you to press backspace to delete the box.

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That worked, thanks. The are below the box is rather small when the cursor is at the bottom of the window.