To make a particular font type and font size persit for other documents on future, you have to set it as the defult.
We will assuming the word processor is ms-word, to make the font persist got to Home, then select the font Button Image, after that you select the size you want and click "Select As Default" and "All documents based on the Normal template".
This will make it you default settings so that in future you do not have to format it again, and ensure you have all the required permission to make these changes
Learn more about word proccessor here:
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