App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 227 · 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 this good or poor button design: a big, easy tap area? (a) good design (b) poor design
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 40 px tall
   Save button: 40 px tall
   Back button: 40 px tall
   Send button: 52 px tall
4. 4.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 68 px tall
   Cancel button: 40 px tall
   Start button: 72 px tall (a) Cancel (b) Back (c) Start
6. 6.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 64 px tall
   Help button: 28 px tall
   Cancel button: 72 px tall
   Save button: 72 px tall (a) Cancel (b) Next (c) Save (d) Help
8. 8.True or false: a big, easy tap area is good button design. (a) False (b) True
9. 9.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) red on green (d) white on black
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Cancel button: 52 px tall
    Next button: 44 px tall
    Send button: 56 px tall (a) Send (b) Cancel (c) Next (d) Help
12. 12.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
13. 13.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
14. 14.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) dark blue on black (d) dark blue on white
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
16. 16.🔘 Is this good or poor button design: space between buttons? (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?
    Cancel button: 36 px tall
    Back button: 56 px tall
    Done button: 36 px tall
    Send button: 60 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Back button: 24 px tall
    Send button: 56 px tall (a) Done (b) Send (c) Back
19. 19.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
20. 20.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Next button: 60 px tall
    Cancel button: 44 px tall
    Save button: 32 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Send button: 60 px tall
    Start button: 72 px tall
    Save button: 32 px tall (a) Back (b) Send (c) Save (d) Start
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Help button: 60 px tall
    Send button: 48 px tall (a) Next (b) Help (c) Send
25. 25.Which colour pair is easy to read? (a) black on pale grey (b) pale pink on white (c) red on green (d) light grey on white
26. 26.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
28. 28.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.True or false: a tiny 20 px button is good button design. (a) False (b) True
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Next button: 68 px tall
    Start button: 24 px tall
    Cancel button: 48 px tall (a) Start (b) Back (c) Next (d) Cancel
31. 31.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
32. 32.True or false: space between buttons is poor button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Cancel button: 64 px tall
    Send button: 60 px tall (a) Send (b) Next (c) Cancel
35. 35.True or false: icons with no meaning is good button design. (a) True (b) False
36. 36.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) light grey on white (d) black on pale grey
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Start button: 40 px tall
    Next button: 60 px tall
    Back button: 56 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Start button: 44 px tall
    Save button: 32 px tall
39. 39.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) dark blue on black (d) black on yellow
40. 40.True or false: a big, easy tap area is poor button design. (a) False (b) True

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