Some misunderstood or unknown tricks (VII) (LaTeX)

This time, as habitually, we shall see some tricks:
2. Putting two itemizations on the same line,
3. Using footnotes in boxes,
4. Dealing with PDF cut-and-past and search functionalities,
even when you are using accented characters,
5. Making a distinction with \overline for propositional logic formulae,
6. Referring to \labels by long names.
We will then discuss some problems people often face when dealing with many figures, and, more generally,
floats, in reports. Finally, we will deal with a Beamer scheme which aims at using a single file for both a presentation, and the related report.