App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 320 · 40 questions

Developer's tip (Big and bold): Our rule: every button is at least 48 px tall. Missing px = 48 − height. Leave space between buttons; use clear words like Save or Send. Strong contrast (black on yellow, white on dark green) is easy to read; similar colours are hard.

1. 1.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 64 px tall
   Save button: 40 px tall
   Send button: 68 px tall
   Help button: 68 px tall (a) Done (b) Help (c) Send (d) Save
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 40 px tall
   Cancel button: 56 px tall
   Help button: 60 px tall (a) Back (b) Help (c) Cancel
3. 3.True or false: strong colour contrast is poor button design. (a) False (b) True
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 32 px tall
   Back button: 48 px tall
   Next button: 72 px tall (a) Next (b) Cancel (c) Back
5. 5.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
7. 7.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) black on yellow (d) light grey on white
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 36 px tall
   Next button: 36 px tall
   Start button: 40 px tall
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 32 px tall
   Send button: 48 px tall
   Help button: 32 px tall
10. 10.True or false: grey text on grey is good button design. (a) True (b) False
11. 11.Which colour pair is hard to read? (a) dark blue on black (b) dark blue on white (c) black on pale grey (d) white on black
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Cancel button: 48 px tall
    Send button: 32 px tall (a) Cancel (b) Help (c) Send
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Help button: 48 px tall
    Cancel button: 32 px tall
    Start button: 56 px tall
16. 16.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Back button: 56 px tall
    Save button: 64 px tall (a) Save (b) Back (c) Next
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
19. 19.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
20. 20.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
21. 21.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
23. 23.Which colour pair is hard to read? (a) dark blue on white (b) yellow on white (c) black on yellow (d) white on black
24. 24.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) pale pink on white (d) white on black
27. 27.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Cancel button: 36 px tall
    Next button: 32 px tall
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Help button: 64 px tall
    Done button: 72 px tall
    Send button: 32 px tall (a) Help (b) Send (c) Save (d) Done
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Back button: 36 px tall
    Help button: 52 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Start button: 36 px tall
    Cancel button: 60 px tall
33. 33.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
35. 35.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) yellow on white (d) black on pale grey
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
37. 37.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.Which colour pair is easy to read? (a) white on black (b) light grey on white (c) dark blue on black (d) yellow on white
39. 39.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Send button: 68 px tall
    Next button: 48 px tall (a) Send (b) Next (c) Back

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