App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 510 · 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. Which button is too small?
   Help button: 24 px tall
   Start button: 64 px tall
   Back button: 60 px tall (a) Help (b) Start (c) Back
2. 2.Which colour pair is easy to read? (a) white on black (b) red on green (c) pale pink on white (d) light grey on white
3. 3.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
5. 5.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 68 px tall
   Done button: 40 px tall
   Help button: 72 px tall (a) Back (b) Done (c) Help
7. 7.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.Which colour pair is easy to read? (a) dark blue on white (b) yellow on white (c) pale pink on white (d) light grey on white
9. 9.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) dark blue on black (d) yellow on white
10. 10.True or false: space between buttons is good button design. (a) True (b) False
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Cancel button: 64 px tall
    Save button: 36 px tall
    Send button: 36 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Start button: 60 px tall
    Next button: 56 px tall
    Send button: 60 px tall (a) Start (b) Next (c) Send (d) Cancel
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Next button: 52 px tall
    Help button: 56 px tall (a) Help (b) Next (c) Done
16. 16.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) light grey on white (d) black on yellow
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Start button: 56 px tall
    Cancel button: 68 px tall
    Done button: 72 px tall (a) Done (b) Cancel (c) Start (d) Back
20. 20.True or false: icons with no meaning is good button design. (a) True (b) False
21. 21.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
22. 22.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
23. 23.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Cancel button: 40 px tall
    Done button: 60 px tall
    Next button: 44 px tall
25. 25.True or false: a tiny 20 px button is poor button design. (a) True (b) False
26. 26.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) black on pale grey (d) yellow on white
27. 27.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Back button: 40 px tall
    Send button: 60 px tall (a) Back (b) Send (c) Cancel
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Next button: 48 px tall
    Done button: 44 px tall (a) Done (b) Save (c) Next
31. 31.True or false: strong colour contrast is poor button design. (a) False (b) True
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Save button: 44 px tall
    Send button: 72 px tall (a) Save (b) Send (c) Next
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Cancel button: 56 px tall
    Save button: 44 px tall
    Send button: 60 px tall (a) Send (b) Save (c) Cancel (d) Next
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
35. 35.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Start button: 40 px tall
    Cancel button: 52 px tall (a) Start (b) Back (c) Cancel
38. 38.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Back button: 28 px tall
    Send button: 52 px tall
    Help button: 52 px tall (a) Send (b) Done (c) Help (d) Back
40. 40.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on pale grey (d) yellow on white

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