Terminal pager

A terminal pager, paging program or simply pager is a computer program used to view (but not modify) the contents of a text file moving down the file one line or one screen at a time. A pager is a tool for displaying the contents of files or other output on the terminal, in a user friendly way, across several screens if needed.

Default pager

The default pager can be configured by setting the PAGER environment variable, and similarly, the default manpager can be configured by setting the MANPAGER environment variable:

PAGER="less"
MANPAGER="less"

Use neovim as man pager

MANPAGER='nvim +Man!'