App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 532 · 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?
   Help button: 52 px tall
   Done button: 32 px tall
   Cancel button: 64 px tall
2. 2.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.Which colour pair is hard to read? (a) yellow on white (b) white on dark green (c) dark blue on white (d) white on black
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 36 px tall
   Save button: 52 px tall
   Done button: 68 px tall (a) Back (b) Done (c) Save
5. 5.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
6. 6.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) black on yellow (d) red on green
7. 7.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.True or false: a tiny 20 px button is good button design. (a) True (b) False
10. 10.Which colour pair is hard to read? (a) dark blue on black (b) white on black (c) black on yellow (d) black on pale grey
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
12. 12.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Cancel button: 72 px tall
    Save button: 64 px tall
    Send button: 24 px tall (a) Cancel (b) Next (c) Save (d) Send
14. 14.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Back button: 64 px tall
    Help button: 28 px tall (a) Back (b) Next (c) Help
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Cancel button: 44 px tall
    Help button: 40 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Back button: 48 px tall
    Help button: 40 px tall (a) Save (b) Back (c) Help
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Save button: 44 px tall
    Cancel button: 40 px tall
22. 22.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.Which colour pair is easy to read? (a) pale pink on white (b) black on pale grey (c) dark blue on black (d) yellow on white
24. 24.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Save button: 32 px tall
    Done button: 60 px tall
    Help button: 36 px tall
26. 26.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) white on black (d) red on green
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Start button: 44 px tall
    Send button: 64 px tall
    Cancel button: 52 px tall
28. 28.🌗 Is dark blue on white 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. Which button is too small?
    Next button: 52 px tall
    Start button: 24 px tall
    Help button: 52 px tall (a) Start (b) Help (c) Next
30. 30.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Done button: 24 px tall
    Next button: 72 px tall (a) Done (b) Next (c) Save
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Next button: 64 px tall
    Back button: 56 px tall
    Save button: 24 px tall (a) Back (b) Next (c) Save (d) Done
33. 33.True or false: a big, easy tap area is poor button design. (a) True (b) False
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Next button: 60 px tall
    Back button: 48 px tall
    Cancel button: 44 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Save button: 68 px tall
    Done button: 56 px tall (a) Save (b) Done (c) Start
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
38. 38.True or false: grey text on grey is good button design. (a) True (b) False
39. 39.True or false: space between buttons is poor button design. (a) True (b) False
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?

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