confusions in Termination Criteria page

[dinohsu1019]

Termination Criteria page:
https://pymoo.org/interface/termination.html?highlight=ftol

A few confusions:

1. Typo: "Commonly used are the movement in the design space f_tol..." => should be x_tol or xtol because f is for objectives.
2. Similar concepts should be clarified: n_gen and n_max_gen, period and n_last
3. underline or not: x_tol or xtol, f_tol or f_tol, naming should be consistent
4. How to change the default? e. g.,
   termination = DefaultMultiObjectiveTermination(
   xtol=1e-8,
   cvtol=1e-6,
   ftol=0.0025,
   period=30,
   n_max_gen=1000,
   n_max_evals=100000
   )
   What if I want to remove ftol and period completely and use n_max_gen, n_max_evals with other customization only?
   Please help improve this page so that new users can pick up quickly, thanks in advance.