App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 566 · 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.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
2. 2.True or false: a tiny 20 px button is poor button design. (a) True (b) False
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 24 px tall
   Done button: 52 px tall
   Send button: 48 px tall (a) Help (b) Send (c) Done
4. 4.True or false: strong colour contrast is poor button design. (a) False (b) True
5. 5.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 32 px tall
   Done button: 60 px tall
   Start button: 64 px tall (a) Start (b) Done (c) Help
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 64 px tall
   Back button: 72 px tall
   Save button: 68 px tall
   Start button: 28 px tall (a) Back (b) Save (c) Send (d) Start
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 44 px tall
   Start button: 36 px tall
   Cancel button: 64 px tall
   Next button: 60 px tall
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 44 px tall
   Cancel button: 48 px tall
   Next button: 32 px tall
   Done button: 36 px tall
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Save button: 68 px tall
    Done button: 40 px tall
    Back button: 48 px tall (a) Save (b) Back (c) Done (d) Start
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Done button: 64 px tall
    Help button: 52 px tall (a) Help (b) Cancel (c) Done
12. 12.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) pale pink on white
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Next button: 52 px tall
    Cancel button: 56 px tall
    Help button: 36 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Help button: 72 px tall
    Start button: 68 px tall (a) Help (b) Start (c) Back
16. 16.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) yellow on white (d) black on yellow
17. 17.True or false: strong colour contrast is good button design. (a) False (b) True
18. 18.True or false: space between buttons is good button design. (a) True (b) False
19. 19.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
20. 20.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) dark blue on white (d) black on yellow
21. 21.🌗 Is black on yellow 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: icons with no meaning? (a) poor design (b) good design
23. 23.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
25. 25.True or false: a big, easy tap area is poor button design. (a) False (b) True
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Done button: 60 px tall
    Cancel button: 24 px tall (a) Cancel (b) Done (c) Start
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Next button: 24 px tall
    Done button: 52 px tall
    Help button: 60 px tall (a) Help (b) Next (c) Back (d) Done
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Next button: 60 px tall
    Send button: 72 px tall
    Done button: 28 px tall (a) Done (b) Next (c) Send (d) Cancel
31. 31.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) red on green (d) black on yellow
32. 32.Which colour pair is easy to read? (a) white on dark green (b) red on green (c) yellow on white (d) light grey on white
33. 33.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
34. 34.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.True or false: space between buttons is poor button design. (a) False (b) True
36. 36.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
38. 38.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Done button: 36 px tall
    Cancel button: 36 px tall
    Start button: 60 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?

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