From 75507fc9eefd89b6d9752b6ba31e89cfee29dd53 Mon Sep 17 00:00:00 2001
From: Vectornaut <vectornaut@nobody@nowhere.net>
Date: Thu, 6 Nov 2025 10:28:24 +0000
Subject: [PATCH] Write about manipulating observables and setting regulators

---
 Command-language.md | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/Command-language.md b/Command-language.md
index dd0de30..074e5e1 100644
--- a/Command-language.md
+++ b/Command-language.md
@@ -48,6 +48,31 @@ Angle a Sphere
 
 By the **creation by presumption** principle, this should create a regulator for the angle between the element `a` and a new sphere.
 
+#### Manipulating observables
+
+```
+Angle a b ~ 30
+```
+
+Push the angle between `a` and `b` toward 30°. This is analogous to the manipulations you might do by dragging elements in the display. It doesn’t create a regulator, because it’s referring to `Angle a b` as an observable.
+
+#### Setting regulators
+
+```
+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.
+
+```
+unset Angle a b
+```
+```
+Angle a b @ unset
+```
+
+Unset the regulator for the angle between `a` and `b`.
+
 ### Identifiers
 
 #### Assigning identifiers