diff --git a/swappy.1.scd b/swappy.1.scd
index b8dfb1f..8642068 100644
--- a/swappy.1.scd
+++ b/swappy.1.scd
@@ -10,12 +10,32 @@ swappy - grab and edit on the fly snapshots of a Wayland compositor
 
 # SYNOPSIS
 
-swappy is a command-line utility to take and edit screenshots of Wayland desktops. For now
-it requires support for the screencopy protocol to work.
+swappy is a command-line utility to take and edit screenshots of Wayland
+desktops. It can also work on regular X11 desktops if using the *-f* option.
 
 swappy will save the swappshot images to a timestamped file name in
-*$XDG_DESKTOP_DIR*. If this variable is not set, it will revert to: *$XDG_CONFIG_HOME/Desktop*.
-If *$XDG_CONFIG_HOME* is not set, it will revert to: *$HOME/Desktop*.
+*$XDG_DESKTOP_DIR*. If this variable is not set, it will revert to:
+*$XDG_CONFIG_HOME/Desktop*. If *$XDG_CONFIG_HOME* is not set, it will revert
+to: *$HOME/Desktop*.
+
+Can be used in two ways, either as the output of grim (recommended) or by
+grabbing the geometry (if the compositor supports the screencopy protocol).
+
+# OPTIONS
+
+*-h*
+	Show help message and quit.
+
+*-g* "<x>,<y> <width>x<height>"
+	Set the region to capture, in layout coordinates. This is slurp friendly.
+
+	Requires a Wayland compositor that supports screencopy protocol.
+
+*-f* <file>
+	A PNG file to load for editing.
+
+	If set to *-*, read the file from standard input instead. This is grim
+	friendly.
 
 # KEY BINDINGS
 
@@ -48,16 +68,6 @@ If *$XDG_CONFIG_HOME* is not set, it will revert to: *$HOME/Desktop*.
 - *Ctrl+c*: Copy to clipboard
 - *Escape* or *q*: Quit swappy
 
-# OPTIONS
-
-*-h*
-	Show help message and quit.
-
-*-g* "<x>,<y> <width>x<height>"
-	Set the region to capture, in layout coordinates.
-
-	This is slurp friendly.
-
 # AUTHORS
 
 Written and maintained by jtheoof <contact@jtheoof.me>. See