Clarify automatic use vs automatic install (#193)

fonsp · web-flow · commit b245c65db415 · 2021-02-03T02:30:59.000-06:00
diff --git a/README.md b/README.md
@@ -20,7 +20,7 @@ Pkg.add("ImageMagick")
 
 ## Usage
 
-ImageMagick will be used as needed if you've said
+After installation, ImageMagick will be used as needed if you've said
 
 ```julia
 using FileIO
