diff --git a/docs/reference/gtk/coordinates.md b/docs/reference/gtk/coordinates.md
index a1fc478cb2..be1d281961 100644
--- a/docs/reference/gtk/coordinates.md
+++ b/docs/reference/gtk/coordinates.md
@@ -3,15 +3,15 @@ Slug: gtk-coordinates
 
 ## Coordinate systems in GTK
 
-Every widget in a window has its own coordinate system that it uses to place its
-child widgets and to interpret events. Most of the time, this fact can be safely
-ignored. The section will explain the details for the few cases when it is important.
-
 All coordinate systems in GTK have the origin at the top left, with the X axis
 pointing right, and the Y axis pointing down. This matches the convention used
 in X11, Wayland and cairo, but differs from OpenGL and PostScript, where the origin
 is in the lower left, and the Y axis is pointin up.
 
+Every widget in a window has its own coordinate system that it uses to place its
+child widgets and to interpret events. Most of the time, this fact can be safely
+ignored. The section will explain the details for the few cases when it is important.
+
 ## The box model
 
 When it comes to rendering, GTK follows the CSS box model as far as practical.