How do you control print area on a spreadsheet?
How do get printer to recognize font size
Please see Help, Using Print Ranges on a Spreadsheet
You can:
- Click Format > Page Style > Sheet and set the scaling factor to 100%, but maybe you would prefer to shrink to fit on a set number of pages (font size will be scaled)
- Or click File > Print Preview and adjust scale there. You might want to set page orientation first in Format > Page Style > Page
The Calc Guide has more information and is more structured than Help, download for free from English documentation | LibreOffice Documentation - LibreOffice User Guides
This seems to be the task of your printer-driver. In some cases this will be answered as “not at all”, because the very simple printer will only receive a digital image of your page, while all rendering is done in the driver.
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In the other cases there is a wide range of “languages” from old ESC/P (wich I remember from DOS-programs, where we really had commands for the printer in the code) to sophisticated engines like postscript (so in some offices the most powerful computer was hidden in the printer).
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If you have problems in this area my recommendation is to export as pdf first, then print the pdf (please not from LibreOffice-Draw, but from any pdf-viewer). Compare results with printing from LibreOffice.