I inserted a row, but it doesn't look like my other rows

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Grunt uses targets to tell rules what they should apply to. If you have a row that doesn't look like the other rows (and you want it to), it almost certainly means that the targets you've set for your rules aren't right. To fix it, open one of the rules that decides what the other rows look like. It could be a Fill rule or a Shape rule for instance. If you hover your mouse over the targets your Include and Exclude lists, you'll probably see that the row you want to target isn't in fact targeted. You should change the targets to include the row you added.