App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 678 · 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?
   Next button: 52 px tall
   Cancel button: 48 px tall
   Save button: 44 px tall (a) Next (b) Save (c) Cancel
2. 2.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
4. 4.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) yellow on white (d) black on pale grey
5. 5.True or false: strong colour contrast is poor button design. (a) False (b) True
6. 6.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
8. 8.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
10. 10.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on pale grey (d) light grey on white
11. 11.Which colour pair is easy to read? (a) light grey on white (b) black on pale grey (c) dark blue on black (d) red on green
12. 12.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Next button: 52 px tall
    Start button: 36 px tall
16. 16.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) red on green (d) pale pink on white
17. 17.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
18. 18.True or false: a clear word like Save is good button design. (a) False (b) True
19. 19.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) pale pink on white (d) black on yellow
20. 20.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) white on black (d) yellow on white
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Cancel button: 56 px tall
    Next button: 56 px tall
    Start button: 48 px tall (a) Back (b) Next (c) Start (d) Cancel
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Cancel button: 44 px tall
    Back button: 56 px tall
24. 24.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Send button: 32 px tall
    Next button: 48 px tall
    Help button: 48 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
27. 27.True or false: strong colour contrast is good button design. (a) True (b) False
28. 28.True or false: a big, easy tap area is good button design. (a) False (b) True
29. 29.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
30. 30.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
32. 32.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Send button: 60 px tall
    Save button: 48 px tall
34. 34.True or false: a clear word like Save is poor button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Save button: 64 px tall
    Help button: 68 px tall
    Cancel button: 68 px tall (a) Help (b) Done (c) Cancel (d) Save
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Send button: 40 px tall
    Start button: 60 px tall
    Back button: 60 px tall
39. 39.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Start button: 60 px tall
    Help button: 40 px tall (a) Start (b) Help (c) Next

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