I want to collect the most common mistakes, misconceptions, pitfalls, etc that (La)TeX and Friends users make. Please one answer for each mistake, misconception, pitfall, etc.
I am only interested in more technical, objective cases rather than psychological, social, subjective cases.
From this complete infinite list of technical and objective cases, we can have a reference how to teach newbies much better directly or indirectly via writing a good book.
The technical and object cases are, for example, as follows.
- Beginners sometimes use
$\huge E=mc^2$with the hope they will get a huge formula. It actually does not produce the expected result. The correct way is
- Beginner sometimes use
tablebecause they assume
longtableis the longer version of
tabularwhich is able to be sandwiched in