App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 420 · 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.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) light grey on white (d) dark blue on white
2. 2.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
3. 3.True or false: a big, easy tap area is good button design. (a) True (b) False
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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 48 px tall
   Help button: 44 px tall
   Back button: 52 px tall (a) Back (b) Help (c) Save
6. 6.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 52 px tall
   Done button: 36 px tall
   Cancel button: 72 px tall
   Back button: 52 px tall (a) Send (b) Back (c) Done (d) Cancel
9. 9.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
10. 10.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Send button: 64 px tall
    Done button: 44 px tall
    Next button: 60 px tall (a) Done (b) Cancel (c) Next (d) Send
12. 12.Which colour pair is easy to read? (a) black on yellow (b) pale pink on white (c) yellow on white (d) light grey on white
13. 13.True or false: grey text on grey is poor button design. (a) True (b) False
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Start button: 56 px tall
    Cancel button: 48 px tall
    Done button: 36 px tall
15. 15.True or false: icons with no meaning is poor button design. (a) True (b) False
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Save button: 40 px tall
    Start button: 44 px tall
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
18. 18.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
21. 21.Which colour pair is easy to read? (a) light grey on white (b) white on black (c) red on green (d) pale pink on white
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
23. 23.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
24. 24.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) red on green
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
27. 27.True or false: icons with no meaning is good button design. (a) True (b) False
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Start button: 64 px tall
    Next button: 44 px tall (a) Next (b) Start (c) Cancel
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
30. 30.Which colour pair is easy to read? (a) white on dark green (b) pale pink on white (c) yellow on white (d) light grey on white
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Back button: 64 px tall
    Save button: 44 px tall (a) Save (b) Back (c) Send
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Done button: 72 px tall
    Next button: 52 px tall (a) Cancel (b) Done (c) Next
34. 34.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
35. 35.True or false: a tiny 20 px button is good button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Cancel button: 60 px tall
    Save button: 32 px tall
    Help button: 64 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Cancel button: 28 px tall
    Send button: 68 px tall
    Save button: 60 px tall (a) Next (b) Send (c) Cancel (d) Save
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Back button: 48 px tall
    Send button: 40 px tall
    Save button: 72 px tall (a) Send (b) Help (c) Back (d) Save
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Done button: 64 px tall
    Cancel button: 40 px tall
    Back button: 68 px tall (a) Cancel (b) Done (c) Start (d) Back
40. 40.True or false: buttons almost touching is good button design. (a) True (b) False

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