diff --git a/pixelgl/doc.go b/pixelgl/doc.go
index 5d5eff6..6feee33 100644
--- a/pixelgl/doc.go
+++ b/pixelgl/doc.go
@@ -1,6 +1,8 @@
-// Package pixelgl provides higher-level abstractions around the basic OpenGL primitives and
+// Package pixelgl provides some abstractions around the basic OpenGL primitives and
 // operations.
 //
+// All calls should be wrapped inside pixelgl.Do/DoNoBlock/DoErr/DoVal.
+//
 // This package deliberately does not handle nor report OpenGL errors, it's up to you to
 // cause none.
 package pixelgl