App Dev Worksheet: Button Size and Contrast

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

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