App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 347 · 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?
   Back button: 28 px tall
   Done button: 52 px tall
   Help button: 52 px tall
   Send button: 52 px tall (a) Send (b) Help (c) Done (d) Back
2. 2.True or false: a tiny 20 px button is poor button design. (a) False (b) True
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
4. 4.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.True or false: space between buttons is good button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 68 px tall
   Send button: 40 px tall
   Save button: 48 px tall
   Next button: 68 px tall (a) Send (b) Cancel (c) Next (d) Save
7. 7.True or false: buttons almost touching is poor button design. (a) True (b) False
8. 8.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.Which colour pair is easy to read? (a) red on green (b) white on dark green (c) light grey on white (d) pale pink on white
10. 10.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) pale pink on white (d) black on pale grey
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Save button: 44 px tall
    Send button: 72 px tall (a) Save (b) Send (c) Next
13. 13.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
14. 14.True or false: icons with no meaning is good button design. (a) False (b) True
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
16. 16.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Start button: 40 px tall
    Send button: 36 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Help button: 64 px tall
    Cancel button: 32 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
20. 20.True or false: grey text on grey is good button design. (a) False (b) True
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Cancel button: 52 px tall
    Start button: 44 px tall (a) Next (b) Cancel (c) Start
22. 22.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.True or false: a clear word like Save is poor button design. (a) True (b) False
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Back button: 32 px tall
    Send button: 44 px tall
    Cancel button: 32 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Send button: 52 px tall
    Back button: 24 px tall
    Start button: 56 px tall (a) Send (b) Start (c) Back (d) Save
27. 27.True or false: a big, easy tap area is good button design. (a) True (b) False
28. 28.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.Which colour pair is easy to read? (a) white on black (b) pale pink on white (c) light grey on white (d) dark blue on black
30. 30.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
31. 31.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) red on green (d) white on dark green
32. 32.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
34. 34.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
35. 35.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Cancel button: 56 px tall
    Back button: 48 px tall
    Save button: 36 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Back button: 52 px tall
    Cancel button: 36 px tall
39. 39.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
40. 40.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design

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