Recapture lost space due to row deletions.

回收由于行删除而丢失的空间。

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Select the white space of any row in the tree and double-click on it.

在树中选择并双击任一行上的白色空间。

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Select the white space of any row in the tree and double-click on it.

在树中选择并双击任一行上的白色空间。

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