App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 483 · 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.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 36 px tall
   Start button: 36 px tall
   Help button: 44 px tall
2. 2.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) white on dark green (d) pale pink on white
3. 3.Which colour pair is hard to read? (a) white on black (b) yellow on white (c) white on dark green (d) black on yellow
4. 4.True or false: a clear word like Save is good button design. (a) True (b) False
5. 5.True or false: space between buttons is good button design. (a) False (b) True
6. 6.True or false: icons with no meaning is poor button design. (a) False (b) True
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 60 px tall
   Next button: 60 px tall
   Help button: 64 px tall
8. 8.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
9. 9.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Done button: 36 px tall
    Start button: 56 px tall
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Cancel button: 32 px tall
    Send button: 32 px tall
    Start button: 32 px tall
12. 12.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
13. 13.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) yellow on white (d) black on yellow
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Help button: 44 px tall
    Back button: 60 px tall
15. 15.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
19. 19.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) yellow on white (d) white on black
20. 20.True or false: a clear word like Save is poor button design. (a) False (b) True
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Start button: 36 px tall
    Next button: 36 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Cancel button: 32 px tall
    Help button: 72 px tall (a) Send (b) Help (c) Cancel
24. 24.🌗 Is black on yellow 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. How many of these buttons follow the rule?
    Start button: 56 px tall
    Save button: 52 px tall
    Done button: 60 px tall
26. 26.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Next button: 24 px tall
    Send button: 48 px tall (a) Next (b) Help (c) Send
28. 28.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Save button: 48 px tall
    Send button: 64 px tall
31. 31.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Start button: 28 px tall
    Back button: 60 px tall
    Save button: 52 px tall (a) Save (b) Start (c) Send (d) Back
33. 33.Which colour pair is hard to read? (a) white on dark green (b) light grey on white (c) black on yellow (d) dark blue on white
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
36. 36.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Done button: 24 px tall
    Save button: 72 px tall
    Cancel button: 52 px tall (a) Cancel (b) Done (c) Save (d) Back
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Next button: 36 px tall
    Start button: 64 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
40. 40.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design

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