App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 409 · 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 big, easy tap area is poor button design. (a) False (b) True
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
3. 3.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
4. 4.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 40 px tall
   Next button: 60 px tall
   Done button: 48 px tall (a) Back (b) Next (c) Done
6. 6.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
7. 7.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 48 px tall
   Next button: 44 px tall
   Start button: 64 px tall (a) Start (b) Next (c) Send
9. 9.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Start button: 48 px tall
    Save button: 68 px tall (a) Start (b) Next (c) Save
11. 11.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) light grey on white (d) white on black
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Start button: 60 px tall
    Next button: 28 px tall
    Save button: 72 px tall (a) Next (b) Save (c) Start (d) Cancel
13. 13.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Save button: 40 px tall
    Cancel button: 40 px tall
15. 15.True or false: space between buttons is good button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
18. 18.True or false: a big, easy tap area is good button design. (a) False (b) True
19. 19.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) light grey on white (d) yellow on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Send button: 32 px tall
    Back button: 40 px tall
21. 21.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) black on yellow (d) light grey on white
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Help button: 52 px tall
    Cancel button: 68 px tall
    Send button: 56 px tall (a) Help (b) Send (c) Cancel (d) Save
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Help button: 52 px tall
    Back button: 64 px tall
    Send button: 56 px tall (a) Help (b) Back (c) Send (d) Cancel
24. 24.🌗 Is dark blue 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. The Cancel button is 36 px tall. How many px taller must it be?
26. 26.Which colour pair is hard to read? (a) red on green (b) black on yellow (c) black on pale grey (d) white on black
27. 27.True or false: icons with no meaning is good button design. (a) False (b) True
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Done button: 64 px tall
    Next button: 60 px tall (a) Help (b) Next (c) Done
29. 29.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
33. 33.True or false: space between buttons is poor button design. (a) True (b) False
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
35. 35.True or false: a tiny 20 px button is poor button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Send button: 56 px tall
    Back button: 56 px tall
    Help button: 52 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 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?
    Help button: 64 px tall
    Back button: 60 px tall
    Cancel button: 60 px tall
    Save button: 32 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Cancel button: 56 px tall
    Help button: 48 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Help button: 36 px tall
    Save button: 68 px tall (a) Save (b) Help (c) Back

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