diff --git a/Design-Doc%3A-%60level%60-tool.md b/Design-Doc%3A-%60level%60-tool.md
index 792ed44..0993b18 100644
--- a/Design-Doc%3A-%60level%60-tool.md
+++ b/Design-Doc%3A-%60level%60-tool.md
@@ -15,8 +15,8 @@ By adding a property `reskit-component[x]`, where x is the index of the componen
 
 What your game does with this information is entirely up to you: reskit just compiles the information on which entities are where and what components are attached to them.
 
-## Map TOML
-This is provided on the command line via `--map-config-file`. The Map TOML primarily is a mapping of string identifiers to numeric identifiers, which are better suited for use on 8-bit and 16-bit systems. You must define numeric identifiers for each string you use as a `reskit-component[x]`.
+## Configuration TOML
+This is provided on the command line via `-c, --config-file`. This argument is required. The configuration TOML primarily is a mapping of string identifiers to numeric identifiers, which are better suited for use on 8-bit and 16-bit systems. You must define numeric identifiers for each string you use as a `reskit-component[x]`.
 
 ### Example
 ```toml