Adjusting green grid lines to avoid overlap when printing

Having trouble working out how to print activities that I have downloaded so they fit onto an A4 piece of paper - can not find how to move/adjust the green grid lines to fit the page without ruining the formatting. Any help would be greatly appreciated.
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  • The green lines displayed in Boardmaker v6 are "page breaks" the software will use when printing. The dimensions are determined by the current default printer, but you can also change them manually.

    Go to the File menu and select "Print Setup". You can set the "Board Size" dimensions manually in inches or centimeters (29.7 mc x 21 cm for A4), or you can go into Printer setup and choose A4, then select the "Use Printer Page" button.

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