Import & split worksheet
By courtesy of Mr.Takasue in C.D.United, here to use his storyboard to explain how to import a hand drawn worksheet to a storyboard in XD

copyright 2020 C.D.United Inc.
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In XD Menu, you can import an image. Or just drag and them from File Explore to XD
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Once the image is imported on the artboard, then create a rectangle over the first cell of the worksheet and Repeat Grid to make them repeat over the entire worksheet.
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Adjust the margin of Repeat grid with a little bit opacity to see through the cells in order to wrap each rectangle over each cell
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select the Repeat Grid and the worksheet image together
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Click Worksheet button on the plugin
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A new storyboard with images are created