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Right-click the square-click the size and properties-the height and width are set to1cm in the navigation bar on the right-and place the square in the first cell to align with the upper left corner.

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Click the triangle arrow in the upper left corner of the spreadsheet to select the whole table, and then adjust the column width and row height to the same size as the square.

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Delete the box, click the selection cell a 1- to switch to the five-stroke input method-right-click the keypad icon-select: special symbol.

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Select a black solid point to insert into cell a 1- click Start-set the size to 20, and select the vertical center and horizontal center.

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Finally, press and hold the lower right corner of cell A 1 to fill it down-and then fill it to the right, so that the bitmap is ready.

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