App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 372 · 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.True or false: a tiny 20 px button is good button design. (a) False (b) True
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
3. 3.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.True or false: buttons almost touching is good button design. (a) True (b) False
5. 5.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
6. 6.True or false: a tiny 20 px button is poor button design. (a) False (b) True
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 52 px tall
   Start button: 60 px tall
   Cancel button: 24 px tall (a) Cancel (b) Back (c) Start
8. 8.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 32 px tall
   Next button: 32 px tall
   Save button: 40 px tall
   Start button: 32 px tall
10. 10.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.Which colour pair is easy to read? (a) light grey on white (b) black on pale grey (c) pale pink on white (d) dark blue on black
12. 12.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) white on black (d) pale pink on white
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Start button: 36 px tall
    Next button: 64 px tall
14. 14.Which colour pair is hard to read? (a) yellow on white (b) black on pale grey (c) black on yellow (d) dark blue on white
15. 15.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) pale pink on white (d) white on black
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Cancel button: 56 px tall
    Start button: 56 px tall
    Back button: 52 px tall
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Next button: 56 px tall
    Cancel button: 24 px tall (a) Cancel (b) Next (c) Done
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
19. 19.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) white on dark green (d) pale pink on white
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
22. 22.True or false: a clear word like Save is poor button design. (a) True (b) False
23. 23.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) light grey on white (d) white on dark green
25. 25.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Done button: 44 px tall
    Start button: 60 px tall
27. 27.True or false: a big, easy tap area is poor button design. (a) False (b) True
28. 28.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Cancel button: 64 px tall
    Send button: 32 px tall (a) Cancel (b) Send (c) Back
30. 30.Which colour pair is hard to read? (a) white on black (b) dark blue on black (c) black on pale grey (d) black on yellow
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Next button: 60 px tall
    Done button: 60 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Start button: 40 px tall
    Send button: 60 px tall
33. 33.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
34. 34.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Done button: 32 px tall
    Send button: 64 px tall
    Back button: 56 px tall
37. 37.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Done button: 64 px tall
    Help button: 28 px tall (a) Help (b) Send (c) Done
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Help button: 48 px tall
    Done button: 24 px tall (a) Done (b) Help (c) Cancel

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