Commands marked with * may be preceded by a number, _N.
          Notes in parentheses indicate the behavior if _N is given.
      h  H                 Display this help.
      q  :q  Q  :Q  ZZ     Exit.
      e  ^E  j  ^N  CR  *  Forward  one line   (or _N lines).
      y  ^Y  k  ^K  ^P  *  Backward one line   (or _N lines).
      f  ^F  ^V  SPACE  *  Forward  one window (or _N lines).
      b  ^B  ESC-v      *  Backward one window (or _N lines).
      z                 *  Forward  one window (and set window to _N).
      w                 *  Backward one window (and set window to _N).
      ESC-SPACE         *  Forward  one window, but don't stop at end-of-file.
      d  ^D             *  Forward  one half-window (and set half-window to _N).
      u  ^U             *  Backward one half-window (and set half-window to _N).
      ESC-)  RightArrow *  Left  one half screen width (or _N positions).
      ESC-(  LeftArrow  *  Right one half screen width (or _N positions).
      F                    Forward forever; like "tail -f".
      r  ^R  ^L            Repaint screen.
      R                    Repaint screen, discarding buffered input.
            Default "window" is the screen height.
            Default "half-window" is half of the screen height.
      /_p_a_t_t_e_r_n          *  Search forward for (_N-th) matching line.
      ?_p_a_t_t_e_r_n          *  Search backward for (_N-th) matching line.
      n                 *  Repeat previous search (for _N-th occurrence).
      N                 *  Repeat previous search in reverse direction.
      ESC-n             *  Repeat previous search, spanning files.
      ESC-N             *  Repeat previous search, reverse dir. & spanning files.
      ESC-u                Undo (toggle) search highlighting.
      &_p_a_t_t_e_r_n          *  Display only matching lines
            Search patterns may be modified by one or more of:
            ^N or !  Search for NON-matching lines.
            ^E or *  Search multiple files (pass thru END OF FILE).
            ^F or @  Start search at FIRST file (for /) or last file (for ?).
            ^K       Highlight matches, but don't move (KEEP position).
            ^R       Don't use REGULAR EXPRESSIONS.
      g  <  ESC-<       *  Go to first line in file (or line _N).
      G  >  ESC->       *  Go to last line in file (or line _N).
      p  %              *  Go to beginning of file (or _N percent into file).
      t                 *  Go to the (_N-th) next tag.
      T                 *  Go to the (_N-th) previous tag.
      {  (  [           *  Find close bracket } ) ].
      }  )  ]           *  Find open bracket { ( [.
      ESC-^F _<_c_1_> _<_c_2_>  *  Find close bracket _<_c_2_>.
      ESC-^B _<_c_1_> _<_c_2_>  *  Find open bracket _<_c_1_> 
            Each "find close bracket" command goes forward to the close bracket 
              matching the (_N-th) open bracket in the top line.
            Each "find open bracket" command goes backward to the open bracket 
              matching the (_N-th) close bracket in the bottom line.
      m_<_l_e_t_t_e_r_>            Mark the current position with .
      '_<_l_e_t_t_e_r_>            Go to a previously marked position.
      ''                   Go to the previous position.
      ^X^X                 Same as '.
            A mark is any upper-case or lower-case letter.
            Certain marks are predefined:
                 ^  means  beginning of the file
                 $  means  end of the file
                            CCHHAANNGGIINNGG FFIILLEESS
      :e [_f_i_l_e]            Examine a new file.
      ^X^V                 Same as :e.
      :n                *  Examine the (_N-th) next file from the command line.
      :p                *  Examine the (_N-th) previous file from the command line.
      :x                *  Examine the first (or _N-th) file from the command line.
      :d                   Delete the current file from the command line list.
      =  ^G  :f            Print current file name.
      -_<_f_l_a_g_>              Toggle a command line option [see OPTIONS below].
      --_<_n_a_m_e_>             Toggle a command line option, by name.
      __<_f_l_a_g_>              Display the setting of a command line option.
      ___<_n_a_m_e_>             Display the setting of an option, by name.
      +_c_m_d                 Execute the less cmd each time a new file is examined.
      !_c_o_m_m_a_n_d             Execute the shell command with $SHELL.
      |XX_c_o_m_m_a_n_d            Pipe file between current pos & mark XX to shell command.
      v                    Edit the current file with $VISUAL or $EDITOR.
      V                    Print version number of "less".
            Most options may be changed either on the command line,
            or from within less by using the - or -- command.
            Options may be given in one of two forms: either a single
            character preceded by a -, or a name preceeded by --.
      -?  ........  --help
                      Display help (from command line).
      -a  ........  --search-skip-screen
                      Forward search skips current screen.
      -A  ........  --SEARCH-SKIP-SCREEN
                      Forward search always skips target line.
      -b [_N]  ....  --buffers=[_N]
                      Number of buffers.
      -B  ........  --auto-buffers
                      Don't automatically allocate buffers for pipes.
      -c  ........  --clear-screen
                      Repaint by clearing rather than scrolling.
      -d  ........  --dumb
                      Dumb terminal.
      -D [_x_n_._n]  .  --color=_x_n_._n
                      Set screen colors. (MS-DOS only)
      -e  -E  ....  --quit-at-eof  --QUIT-AT-EOF
                      Quit at end of file.
      -f  ........  --force
                      Force open non-regular files.
      -F  ........  --quit-if-one-screen
                      Quit if entire file fits on first screen.
      -g  ........  --hilite-search
                      Highlight only last match for searches.
      -G  ........  --HILITE-SEARCH
                      Don't highlight any matches for searches.
      -h [_N]  ....  --max-back-scroll=[_N]
                      Backward scroll limit.
      -i  ........  --ignore-case
                      Ignore case in searches that do not contain uppercase.
      -I  ........  --IGNORE-CASE
                      Ignore case in all searches.
      -j [_N]  ....  --jump-target=[_N]
                      Screen position of target lines.
      -J  ........  --status-column
                      Display a status column at left edge of screen.
      -k [_f_i_l_e]  .  --lesskey-file=[_f_i_l_e]
                      Use a lesskey file.
      -K            --quit-on-intr
                      Exit less in response to ctrl-C.
      -L  ........  --no-lessopen
                      Ignore the LESSOPEN environment variable.
      -m  -M  ....  --long-prompt  --LONG-PROMPT
                      Set prompt style.
      -n  -N  ....  --line-numbers  --LINE-NUMBERS
                      Don't use line numbers.
      -o [_f_i_l_e]  .  --log-file=[_f_i_l_e]
                      Copy to log file (standard input only).
      -O [_f_i_l_e]  .  --LOG-FILE=[_f_i_l_e]
                      Copy to log file (unconditionally overwrite).
      -p [_p_a_t_t_e_r_n]  --pattern=[_p_a_t_t_e_r_n]
                      Start at pattern (from command line).
      -P [_p_r_o_m_p_t]   --prompt=[_p_r_o_m_p_t]
                      Define new prompt.
      -q  -Q  ....  --quiet  --QUIET  --silent --SILENT
                      Quiet the terminal bell.
      -r  -R  ....  --raw-control-chars  --RAW-CONTROL-CHARS
                      Output "raw" control characters.
      -s  ........  --squeeze-blank-lines
                      Squeeze multiple blank lines.
      -S  ........  --chop-long-lines
                      Chop long lines.
      -t [_t_a_g]  ..  --tag=[_t_a_g]
                      Find a tag.
      -T [_t_a_g_s_f_i_l_e] --tag-file=[_t_a_g_s_f_i_l_e]
                      Use an alternate tags file.
      -u  -U  ....  --underline-special  --UNDERLINE-SPECIAL
                      Change handling of backspaces.
      -V  ........  --version
                      Display the version number of "less".
      -w  ........  --hilite-unread
                      Highlight first new line after forward-screen.
      -W  ........  --HILITE-UNREAD
                      Highlight first new line after any forward movement.
      -x [_N[,...]]  --tabs=[_N[,...]]
                      Set tab stops.
      -X  ........  --no-init
                      Don't use termcap init/deinit strings.
                      Don't use termcap keypad init/deinit strings.
      -y [_N]  ....  --max-forw-scroll=[_N]
                      Forward scroll limit.
      -z [_N]  ....  --window=[_N]
                      Set size of window.
      -" [_c[_c]]  .  --quotes=[_c[_c]]
                      Set shell quote characters.
      -~  ........  --tilde
                      Don't display tildes after end of file.
      -# [_N]  ....  --shift=[_N]
                      Horizontal scroll amount (0 = one half screen width)
          ........  --no-keypad
                      Don't send keypad init/deinit sequence.
          ........  --follow-name
                      The F command changes files if the input file is renamed.
                              LLIINNEE EEDDIITTIINNGG
            These keys can be used to edit text being entered 
            on the "command line" at the bottom of the screen.
     RightArrow                       ESC-l     Move cursor right one character.
     LeftArrow                        ESC-h     Move cursor left one character.
     CNTL-RightArrow  ESC-RightArrow  ESC-w     Move cursor right one word.
     CNTL-LeftArrow   ESC-LeftArrow   ESC-b     Move cursor left one word.
     HOME                             ESC-0     Move cursor to start of line.
     END                              ESC-$     Move cursor to end of line.
     BACKSPACE                                  Delete char to left of cursor.
     DELETE                           ESC-x     Delete char under cursor.
     CNTL-BACKSPACE   ESC-BACKSPACE             Delete word to left of cursor.
     CNTL-DELETE      ESC-DELETE      ESC-X     Delete word under cursor.
     CNTL-U           ESC (MS-DOS only)         Delete entire line.
     UpArrow                          ESC-k     Retrieve previous command line.
     DownArrow                        ESC-j     Retrieve next command line.
     TAB                                        Complete filename & cycle.
     SHIFT-TAB                        ESC-TAB   Complete filename & reverse cycle.
     CNTL-L                                     Complete filename, list all.

Designed by SanjuD(@ngineerbabu)