App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 110 · 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: buttons almost touching? (a) good design (b) poor design
2. 2.True or false: strong colour contrast is poor button design. (a) True (b) False
3. 3.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
4. 4.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) black on yellow (d) pale pink on white
5. 5.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on black (c) white on dark green (d) dark blue on white
6. 6.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.True or false: space between buttons is good button design. (a) False (b) True
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 56 px tall
   Cancel button: 68 px tall
   Save button: 40 px tall (a) Cancel (b) Start (c) Save
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 60 px tall
   Next button: 40 px tall
   Start button: 68 px tall (a) Save (b) Start (c) Next
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: 36 px tall
    Done button: 44 px tall
    Help button: 44 px tall
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Help button: 48 px tall
    Next button: 40 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Save button: 32 px tall
    Help button: 52 px tall
    Back button: 32 px tall
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Help button: 44 px tall
    Save button: 52 px tall
    Cancel button: 56 px tall (a) Done (b) Help (c) Cancel (d) Save
14. 14.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
15. 15.True or false: buttons almost touching is good button design. (a) True (b) False
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Back button: 32 px tall
    Start button: 44 px tall
    Done button: 32 px tall
19. 19.True or false: grey text on grey is good button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Cancel button: 44 px tall
    Help button: 60 px tall
22. 22.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
23. 23.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) black on yellow (d) pale pink on white
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
25. 25.True or false: a clear word like Save is poor button design. (a) False (b) True
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Cancel button: 48 px tall
    Back button: 40 px tall
    Save button: 64 px tall (a) Save (b) Cancel (c) Back (d) Send
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
28. 28.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) dark blue on white (d) pale pink on white
29. 29.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Send button: 52 px tall
    Back button: 48 px tall
    Help button: 40 px tall
31. 31.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) red on green (d) black on pale grey
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Back button: 32 px tall
    Next button: 44 px tall
    Done button: 60 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Back button: 72 px tall
    Start button: 56 px tall (a) Back (b) Start (c) Send
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Done button: 60 px tall
    Save button: 64 px tall
    Next button: 52 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Save button: 56 px tall
    Back button: 44 px tall
    Start button: 60 px tall
37. 37.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
39. 39.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
40. 40.True or false: icons with no meaning is good button design. (a) True (b) False

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