tput command uses
tput [-Ttype] capname [parms ... ]
For a complete list of capabilities and the
capname associated with each, see terminfo(5).
indicates the capability from the terminfo database. When termcap support is compiled in, the termcap name for the capability is also accepted.
cnorm are documented in
terminfo's man page:
cursor_invisible civis vi make cursor invisi‐
cursor_normal cnorm ve make cursor appear
In general, when you don't know which man page describes a particular command, you can search for it. In this case, I found the above by running
man -K civis.