App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 583 · 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 white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 52 px tall
   Done button: 28 px tall
   Next button: 72 px tall (a) Next (b) Help (c) Done
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
5. 5.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) red on green (d) light grey on white
6. 6.Which colour pair is hard to read? (a) light grey on white (b) black on pale grey (c) white on dark green (d) dark blue on white
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 48 px tall
   Next button: 44 px tall
   Done button: 48 px tall
   Save button: 64 px tall (a) Next (b) Done (c) Cancel (d) Save
9. 9.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
10. 10.True or false: icons with no meaning is good button design. (a) False (b) True
11. 11.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Cancel button: 52 px tall
    Send button: 36 px tall
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Help button: 24 px tall
    Save button: 48 px tall (a) Save (b) Help (c) Next
14. 14.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
15. 15.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) dark blue on white (d) dark blue on black
16. 16.True or false: buttons almost touching is good button design. (a) False (b) True
17. 17.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
18. 18.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
19. 19.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Next button: 48 px tall
    Save button: 56 px tall (a) Done (b) Next (c) Save
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Back button: 68 px tall
    Save button: 28 px tall (a) Save (b) Cancel (c) Back
22. 22.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Save button: 60 px tall
    Help button: 60 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Done button: 48 px tall
    Next button: 56 px tall (a) Next (b) Cancel (c) Done
25. 25.True or false: a tiny 20 px button is poor button design. (a) True (b) False
26. 26.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
28. 28.True or false: space between buttons is poor button design. (a) True (b) False
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Send button: 56 px tall
    Save button: 48 px tall
    Back button: 36 px tall (a) Send (b) Save (c) Cancel (d) Back
30. 30.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
32. 32.True or false: space between buttons is good button design. (a) True (b) False
33. 33.🌗 Is yellow on white 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. Which button is too small?
    Save button: 68 px tall
    Next button: 56 px tall
    Start button: 28 px tall (a) Save (b) Start (c) Next
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Save button: 40 px tall
    Start button: 72 px tall
    Next button: 72 px tall (a) Next (b) Cancel (c) Save (d) Start
36. 36.True or false: a clear word like Save is poor button design. (a) True (b) False
37. 37.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) black on pale grey (d) light grey on white
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Start button: 36 px tall
    Send button: 52 px tall (a) Cancel (b) Send (c) Start
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Start button: 24 px tall
    Cancel button: 68 px tall
    Next button: 48 px tall (a) Next (b) Start (c) Save (d) Cancel
40. 40.True or false: a big, easy tap area is poor button design. (a) True (b) False

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