Update README

README.md

@@ -10,14 +10,14 @@ You can get the device image from the CLI and copy it to the clipboard
 
 ## Install
 
-You can install pbssc with homebrew.
+You can install pbssc with Homebrew.
 
 ```
 % brew tap sakebook/tap && brew install pbssc
 ```
 
 ## Setup
-- Set environment variable `PBSSC_IMAGE_PATH` images save path to `.zshrc`.
+- Set environment variable `PBSSC_IMAGE_PATH`. This is an images save path.
 
 ```
 export PBSSC_IMAGE_PATH=/YOUR/PATH
@@ -26,11 +26,16 @@ export PBSSC_IMAGE_PATH=/YOUR/PATH
 ## Android device
 
 ```
-% ./pbssc -a
+% pbssc -a
 ```
 
 ## iOS device
 
 ```
-% ./pbssc -i
+% pbssc -i
+```
+## Save only screenshot from connected devices
+
+```
+% pbssc -s
 ```