[texworks] changing font size

[Jane]

Please tell me how to change the font size of the main text on a pdf LaTex document. Thank you.



----- configuration info -----
TeXworks version : 0.6.2r.7ecce17 (travis-ci)
Install location : C:/Program Files (x86)/TeXworks/TeXworks.exe
Library path     : C:/Users/janes/TeXworks\
pdfTeX location  : not found
Operating system : Windows 10, 64-bit
Qt version       : 5.8.0 (build) / 5.8.0 (runtime)
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Sent from Mail for Windows 10

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