App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 614 · 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: space between buttons is poor button design. (a) False (b) True
2. 2.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 60 px tall
   Next button: 40 px tall
   Help button: 48 px tall
4. 4.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) white on dark green (d) light grey on white
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 28 px tall
   Cancel button: 52 px tall
   Save button: 64 px tall
   Help button: 48 px tall (a) Cancel (b) Help (c) Done (d) Save
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
7. 7.True or false: a clear word like Save is good button design. (a) False (b) True
8. 8.True or false: grey text on grey is good button design. (a) True (b) False
9. 9.True or false: strong colour contrast is poor button design. (a) False (b) True
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Send button: 60 px tall
    Save button: 36 px tall
11. 11.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
12. 12.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) pale pink on white (d) white on black
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Help button: 60 px tall
    Next button: 52 px tall (a) Help (b) Next (c) Cancel
14. 14.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Send button: 32 px tall
    Back button: 56 px tall
    Save button: 40 px tall
16. 16.True or false: buttons almost touching is good button design. (a) True (b) False
17. 17.True or false: buttons almost touching is poor button design. (a) False (b) True
18. 18.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Send button: 24 px tall
    Done button: 56 px tall (a) Cancel (b) Done (c) Send
21. 21.Which colour pair is easy to read? (a) black on yellow (b) pale pink on white (c) light grey on white (d) dark blue on black
22. 22.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
23. 23.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Cancel button: 60 px tall
    Help button: 48 px tall
    Back button: 36 px tall (a) Help (b) Back (c) Cancel (d) Next
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Done button: 44 px tall
    Start button: 48 px tall
    Cancel button: 56 px tall
26. 26.🌗 Is white on black 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. The Cancel button is 24 px tall. How many px taller must it be?
28. 28.True or false: strong colour contrast is good button design. (a) False (b) True
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
30. 30.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) red on green (d) white on black
31. 31.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Cancel button: 60 px tall
    Next button: 64 px tall
    Send button: 60 px tall (a) Cancel (b) Send (c) Next (d) Help
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Done button: 40 px tall
    Next button: 44 px tall
    Save button: 52 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Next button: 28 px tall
    Cancel button: 60 px tall
    Done button: 56 px tall (a) Save (b) Done (c) Next (d) Cancel
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Help button: 28 px tall
    Done button: 56 px tall (a) Help (b) Done (c) Start
36. 36.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
37. 37.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) black on yellow (d) red on green
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Help button: 64 px tall
    Save button: 60 px tall
    Cancel button: 28 px tall (a) Back (b) Save (c) Cancel (d) Help
40. 40.True or false: grey text on grey is poor button design. (a) False (b) True

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