updated README.txt

README.txt

@@ -17,6 +17,7 @@ REQUIREMENTS
 - Optional: wl-copy / xclip / xsel / pbcopy  (for clipboard support)
 - Optional: mpv, vlc, feh, zathura, etc.     (for smart file opening)
 - Optional: readlink                         (for symlink display)
+- Optional: file                             (for MIME type detection)
 
 
 INSTALLATION
@@ -41,9 +42,15 @@ Manual installation:
 
 USAGE
 -----
-   sfm
+   sfm [path]
 
-sfm will opens in the current directory.
+If no path is given, sfm opens in the current directory.
+
+Examples:
+   sfm              # open in current directory
+   sfm /mnt/data    # open at a specific path
+   sfm ~            # open home directory
+   sfm ..           # open parent directory
 
 
 NAVIGATION
@@ -68,11 +75,23 @@ DISPLAY TOGGLES
 ---------------
   .       Toggle hidden files (dotfiles)
   T       Toggle size/date detail column
+  P       Toggle preview pane (right side)
   s       Cycle sort mode: name -> size -> date
   i       Show file info (permissions, size, date) in status bar
   R       Refresh current directory listing
 
 
+PREVIEW PANE
+------------
+Press P to toggle the preview pane on the right side of the screen.
+The list pane takes the left half, preview takes the right half.
+
+  Text files      Shows file contents line by line
+  Directories     Shows entry count
+  Symlinks        Shows link target
+  Binary files    Shows file size
+
+
 FILE OPERATIONS
 ---------------
   r       Rename selected entry
@@ -164,4 +183,3 @@ DATA FILES
 ----------
   ~/.config/sfm/bookmarks     Saved bookmarks (one path per line)
   ~/.local/share/sfm-trash/   Trashed files
-