linux - Change width of man command ouput -

i use guake terminal emulator lot. it's best thing since sliced bred imo.

but 1 thing has been bugging me, when want read man pages default width of output width of terminal windows, in case full screen it's bit difficult read.

is there way can make default width of output of man command a, pleasant read, 80 characters?

the man page man has part:

   manwidth           if  $manwidth  set, value used line length manual pages should formatted.  if not set,           manual pages formatted line length appropriate current terminal (using ioctl(2) if available,           value  of  $columns,  or  falling   80 characters if neither available).  cat pages saved when           default formatting can used, when terminal line length between 66 , 80 characters. 

but cant figure out change it.

i tried adding line:

manwidth 80

to /etc/manpath.config , ~/.bashrc, no result.

that's environment variable.

try:

manwidth=80 export manwidth man bash 

if want set permanently can add first 2 lines shell session startup scripts or similar.