diff --git a/crates/fj-math/src/coordinates.rs b/crates/fj-math/src/coordinates.rs
index b56cc52c8..767bf7ddf 100644
--- a/crates/fj-math/src/coordinates.rs
+++ b/crates/fj-math/src/coordinates.rs
@@ -1,6 +1,14 @@
 use super::Scalar;
 
 /// 1-dimensional curve coordinates
+///
+/// One-dimensional [`Point`]s and [`Vector`]s dereference to this type (via
+/// [`Deref`]). This allows you to access the `t` field, even though [`Point`]
+/// and [`Vector`] do not have such a field themselves.
+///
+/// [`Deref`]: std::ops::Deref
+/// [`Point`]: crate::Point
+/// [`Vector`]: crate::Vector
 #[repr(C)]
 pub struct T {
     /// The single coordinate of the 1-dimensional curve coordinates
@@ -8,6 +16,14 @@ pub struct T {
 }
 
 /// 2-dimensional surface coordinates
+///
+/// Two-dimensional [`Point`]s and [`Vector`]s dereference to this type (via
+/// [`Deref`]). This allows you to access the `u`/`v` fields, even though
+/// [`Point`] and [`Vector`] do not have such fields themselves.
+///
+/// [`Deref`]: std::ops::Deref
+/// [`Point`]: crate::Point
+/// [`Vector`]: crate::Vector
 #[repr(C)]
 pub struct Uv {
     /// The first coordinate of the 2-dimensional surface coordinates
@@ -18,6 +34,14 @@ pub struct Uv {
 }
 
 /// 3-dimensional model coordinates
+///
+/// Three-dimensional [`Point`]s and [`Vector`]s dereference to this type (via
+/// [`Deref`]). This allows you to access the `x`/`y`/`z` fields, even though
+/// [`Point`] and [`Vector`] do not have such fields themselves.
+///
+/// [`Deref`]: std::ops::Deref
+/// [`Point`]: crate::Point
+/// [`Vector`]: crate::Vector
 #[repr(C)]
 pub struct Xyz {
     /// The first coordinate of the 3-dimensional model coordinates