Use the psfrag package to replace strings in EPS images, so that they are typeset with the same body font as your LaTeX document. Note that your project needs to be compiled with the LaTeX dvipdf engine. To configure this, after creating a new project, click on the Overleaf menu icon above the file list panel, and make sure the "Compiler" setting is set to "LaTeX". (The sample image is taken from the psfrag package.)
This project typesets the source code documentation for 3 TeX engines: Knuth's TeX, e-TeX or pdfTeX—by default it typesets the source code for e-TeX. All .tex source files were extracted from the original WEB source code after processing via a Web2C-based workflow. To typeset the documentation for a particular engine, just uncomment the relevant line in main.tex and comment out the others.
Some examples of how the packages tikz and pgfplots can be used to create fully vectorized graphics directly in the LaTeX document. An example of how a flowchart can be generated in LaTeX is also given. It combines the packages tikz and overpic and shows how to overlay/embed intrinsic LaTeX text onto images created elsewhere.
This is a tikz-drawn facsimile for D. J. Griffith's script r notation, used in his book Introduction to Electrodynamics. Feel free to use the code as you will, don't bother mentioning my name when doing it.
A short primer of how reference with an approximation of UWE Harvard style.
Note that it doesn't quite match the quirks of when UWE Harvard uses et.al. after the first time a reference is cited within your text (i.e. this template works according to the rules of the first time a piece is cited within text, rather than the subsequent modifications).