Clarify syntax options; mention interactive help advantage of named

Command-language.md

@@ -32,10 +32,10 @@ We could make regulator references more visually coherent, and help distinguish
 
 #### Creating regulators
 
+_Syntax options_
 ```
 Angle a b
 ```
-
 ```
 regulate Angle a b
 ```
@@ -64,6 +64,7 @@ Angle a b @ 30
 
 Set the regulator for the angle between `a` and `b` to 30°, creating the regulator if it doesn’t already exist.
 
+_Syntax options_
 ```
 unset Angle a b
 ```
@@ -77,6 +78,7 @@ Unset the regulator for the angle between `a` and `b`.
 
 #### Assigning identifiers
 
+_Syntax options_
 ```
 a is Sphere
 ```
@@ -84,8 +86,9 @@ a is Sphere
 Sphere named a
 ```
 
-Create a sphere, as described above, and set its identifier to `a`.
+Create a sphere, as described above, and set its identifier to `a`. The `is` option follows the strong tradition of putting identifiers on the left, but the `named` option might work better with an interactive help system.
 
+_Syntax options_
 ```
 r is Angle a b
 ```
@@ -95,6 +98,7 @@ Angle a b named r
 
 Assign the identifier `r` to the regulator for the angle between `a` and `b`, creating the regulator if it doesn’t exist already.
 
+_Syntax options_
 ```
 a is c
 ```
@@ -106,6 +110,7 @@ Assign the a new identifier, `a`, to the object with the identifier `c`.
 
 #### Nesting identifier assignments
 
+_Syntax options_
 ```
 r is Angle a b is Sphere
 ```
@@ -119,5 +124,3 @@ It seems like this should assign the identifier `r` to the angle between `a` and
 - If the language is purely expression-based:
   - An `is` expression could return unit, making it semantically inadmissible for nesting.
   - An `is` expression could require punctuation for nesting.
-
-The `is` option follows the strong tradition of putting identifiers on the left.