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Right-click a row where you want to add a new one.
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Select Insert and then choose
 Insert Rows Above or  Insert Rows Below.
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Right-click a row where you want to add a new one.
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Select
 Insert and then choose  Insert Row Above or   Insert Row Below.
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Control-click a row where you want to add a new one.
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Select Insert and then choose Rows Above or Rows Below.