README.md in ar-enum-0.1.0 vs README.md in ar-enum-0.2.0

@@ -24,10 +24,12 @@
 
     $ gem install ar-enum
 
 ## Usage
 
+### Creating enums
+
 To create a `enum` type, use the method `create_enum`.
 
 ```ruby
 # The type is created independently from the table.
 create_enum :article_status, %w[draft published]
@@ -36,10 +38,12 @@
   # Use the type `article_status` when defining your column.
   t.column :status, :article_status, null: false, default: "draft"
 end
 ```
 
+### Dropping enums
+
 To remove the enum, use `drop_enum`.
 
 ```ruby
 drop_enum :article_status
 ```
@@ -55,10 +59,12 @@
 ```ruby
 change_column :articles, :status, :text
 drop_enum :article_status
 ```
 
+### Adding new labels
+
 Use `add_enum_label` to add new values to the enum type. You can control where the value will be inserted by using `before: label` and `after: label`.
 
 ```ruby
 create_enum :article_status, %w[draft published]
 
@@ -70,19 +76,37 @@
 
 # labels will be sorted as [draft, unlisted, published]
 add_enum_value :article_status, "unlisted", before: "published"
 ```
 
+**WARNING:** PostgreSQL does not have a way of removing values from enum types.
+
+### Renaming existing labels
+
 Use `rename_enum_label` to rename a value.
 
 ```ruby
 create_enum :article_status, %w[draft unlisted published]
 
-# labels will be [draft, hidden, unlisted]
-rename_enum_label :article_status, "unlisted", "hidden"
+# labels will be [draft, unlisted, live]
+rename_enum_label :article_status, "published", "live"
 ```
 
-**WARNING:** PostgreSQL does not have a way of removing values from enum types.
+### Reversing changes
+
+The following commands can be reversed:
+
+- `create_enum`
+- `rename_enum_label`
+
+
+```ruby
+class CreateColorEnumClass < ActiveRecord::Migration
+  def change
+    create_enum :color, %w[red blue black]
+  end
+end
+```
 
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake test` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.