To change the font of a whole LaTeX document, load a font package in the preamble, for example \usepackage{newtxtext,newtxmath} for a Times-style font with pdfLaTeX. With XeLaTeX or LuaLaTeX, load fontspec and pick any installed font with \setmainfont. Change the base size with a class option such as 12pt, or locally with commands like \large.
The most reliable way to convert LaTeX to Word is Pandoc: run pandoc paper.tex -o paper.docx --citeproc --bibliography=refs.bib. Equations become editable Word equations, images are embedded and citations are formatted. Add --reference-doc=template.docx to apply your Word styles. For a single formula, paste it into Word's equation editor in LaTeX mode.
Google Docs has no LaTeX export, so convert in two steps. Choose File > Download > Microsoft Word (.docx) or Markdown (.md), then run Pandoc: pandoc mydoc.docx -s -o mydoc.tex --extract-media=. The .docx route keeps headings, lists, tables, images and equations. Finally, open the .tex file in Overleaf and tidy the formatting.
