cleanup usability

lectures/user-experience/slides.qmd

@@ -227,17 +227,20 @@ def is_tropical_atlantic(*, lon, lat):
 
 ![](static/mpim_door.jpeg){width="60%"}
 
-## Usability {.leftalign}
-You get a result and the software is intuitive and easy to work with.
+## Usability
+You get a result and the software is<br/>intuitive and easy to work with.
 
-### Ease of use
+## Usability: Ease of use {.leftalign}
 * intuition = function
 * standards
-* design needs to have a logical flow
-* well-structured navigation system or documentation helps
+* logical flow
+* well-structured navigation system or documentation
 
-### Efficiency
-* a result is there in a reasonable time.
+## Usability: Efficiency {.leftalign}
+A result is there in
+
+* reasonable time
+* using reasonable resources
 
 # Information architecture