diff --git a/LICENSE.mit b/LICENSE.mit
index e69de29..0aeba95 100644
--- a/LICENSE.mit
+++ b/LICENSE.mit
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 MaikelChan
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/main.go b/main.go
index e53b4f0..07a4c43 100644
--- a/main.go
+++ b/main.go
@@ -103,6 +103,8 @@ Options:
   -q, --querycount         Query internal counter
   -E, --eject uint         Eject paper by N lines
   -R, --retract uint       Retract paper by N lines
+  -o, --output <file>      Output PNG preview instead of printing.
+                           If <file> is "-", writes PNG to stdout.
   <image_path or ->        Path to PNG/JPG to print, or '-' for stdin`)
 	}
 }