Ligratures is a technique in which some pairs (or collections) of letters are output as a single symbol when PDFs are created. Common examples are ff and tt. Ligratures are supposed to create better looking PDFs. This is quite okay if the PDF is the final form of the text you are writing. But if you want to edit the PDF or copy the text to some other place, ligratures cause much hazzle. Therefore, it is advicable to get rid of the ligratures. This can be done easily by adding the following code to your latex documents.
\usepackage{microtype}
\DisableLigatures{encoding = *, family = * }
Last edit 2020-11-28