Talk:Robot-chan/@comment-34606486-20181224220322/@comment-39054378-20190419024004

You can cancel it if you haven't published it yet. If you've already published it, click "Edit" and delete the mistake. For info-boxes, I'm not sure you can delete them. If you're still editing, I'm pretty sure there are two buttons. One of them will undo something, the other will redo. The button looks like a back arrow, expect not straight.