App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 166 · 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.True or false: a clear word like Save is good button design. (a) False (b) True
2. 2.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
3. 3.True or false: space between buttons is poor button design. (a) True (b) False
4. 4.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) yellow on white (d) white on dark green
5. 5.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
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.True or false: grey text on grey is good button design. (a) False (b) True
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
9. 9.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
10. 10.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
11. 11.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) yellow on white (d) red on green
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Send button: 44 px tall
    Help button: 32 px tall
    Save button: 60 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Cancel button: 56 px tall
    Start button: 68 px tall
    Save button: 24 px tall (a) Start (b) Help (c) Cancel (d) Save
15. 15.True or false: buttons almost touching is poor button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Start button: 64 px tall
    Save button: 44 px tall
    Send button: 36 px tall
17. 17.True or false: grey text on grey is poor button design. (a) False (b) True
18. 18.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Save button: 56 px tall
    Help button: 52 px tall
    Next button: 60 px tall (a) Help (b) Save (c) Next (d) Start
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Send button: 36 px tall
    Save button: 40 px tall
21. 21.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) white on dark green (d) dark blue on black
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Done button: 40 px tall
    Start button: 60 px tall
25. 25.True or false: strong colour contrast is good button design. (a) True (b) False
26. 26.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Cancel button: 64 px tall
    Start button: 36 px tall
    Send button: 48 px tall (a) Send (b) Start (c) Cancel (d) Next
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Done button: 48 px tall
    Next button: 36 px tall
30. 30.True or false: a tiny 20 px button is poor button design. (a) False (b) True
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
32. 32.True or false: a big, easy tap area is poor button design. (a) False (b) True
33. 33.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) red on green (d) black on pale grey
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Done button: 64 px tall
    Help button: 72 px tall
    Start button: 68 px tall (a) Done (b) Start (c) Send (d) Help
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
36. 36.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) pale pink on white (d) white on black
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Help button: 44 px tall
    Back button: 48 px tall
    Save button: 68 px tall (a) Back (b) Save (c) Help (d) Next
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Next button: 36 px tall
    Done button: 44 px tall
    Help button: 44 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Next button: 56 px tall
    Done button: 44 px tall
    Start button: 72 px tall (a) Done (b) Start (c) Next (d) Save

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