Fix confusing writing in Your first Spatial shader

tutorials/shading/your_first_shader/your_first_spatial_shader.rst

@@ -270,8 +270,8 @@ a second noise texture.
 
   uniform sampler2D normalmap;
 
-Set this second uniform texture to another NoiseTexture with another OpenSimplexNoise. But this time, check
-off "As Normalmap".
+Set this second uniform texture to another NoiseTexture with another
+OpenSimplexNoise. But this time, check **As Normalmap**.
 
 .. image:: img/normal-set.png