App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 146 · 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 light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.Which colour pair is easy to read? (a) black on yellow (b) light grey on white (c) yellow on white (d) pale pink on white
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 68 px tall
   Start button: 60 px tall
   Help button: 32 px tall (a) Save (b) Help (c) Start
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 48 px tall
   Start button: 52 px tall
   Done button: 44 px tall (a) Start (b) Done (c) Next
6. 6.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 44 px tall
   Done button: 56 px tall
   Help button: 72 px tall
   Start button: 48 px tall (a) Help (b) Done (c) Next (d) Start
8. 8.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) pale pink on white (d) white on black
9. 9.True or false: a clear word like Save is poor button design. (a) True (b) False
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Start button: 56 px tall
    Cancel button: 40 px tall
    Save button: 72 px tall (a) Start (b) Save (c) Cancel (d) Send
11. 11.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
12. 12.True or false: buttons almost touching is poor button design. (a) False (b) True
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Done button: 40 px tall
    Start button: 56 px tall
14. 14.True or false: a big, easy tap area is good button design. (a) True (b) False
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Send button: 60 px tall
    Save button: 56 px tall
    Next button: 56 px tall
16. 16.True or false: a tiny 20 px button is good button design. (a) False (b) True
17. 17.True or false: space between buttons is poor button design. (a) True (b) False
18. 18.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) light grey on white (d) dark blue on black
19. 19.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
21. 21.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
22. 22.True or false: strong colour contrast is poor button design. (a) True (b) False
23. 23.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Save button: 56 px tall
    Next button: 68 px tall (a) Cancel (b) Next (c) Save
26. 26.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Send button: 52 px tall
    Save button: 64 px tall (a) Save (b) Cancel (c) Send
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Cancel button: 64 px tall
    Done button: 48 px tall
    Next button: 64 px tall (a) Cancel (b) Done (c) Next (d) Back
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Next button: 56 px tall
    Start button: 64 px tall (a) Next (b) Help (c) Start
32. 32.True or false: icons with no meaning is poor button design. (a) False (b) True
33. 33.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
34. 34.True or false: grey text on grey is poor button design. (a) False (b) True
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Next button: 36 px tall
    Help button: 36 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
37. 37.True or false: strong colour contrast is good button design. (a) True (b) False
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 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: 72 px tall
    Next button: 64 px tall
    Back button: 24 px tall
    Done button: 64 px tall (a) Back (b) Next (c) Done (d) Send
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Send button: 72 px tall
    Next button: 44 px tall
    Start button: 48 px tall (a) Next (b) Send (c) Start (d) Done

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