App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 183 · 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: space between buttons is poor button design. (a) True (b) False
2. 2.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) black on yellow (d) red on green
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
5. 5.True or false: space between buttons is good button design. (a) False (b) True
6. 6.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) yellow on white (d) red on green
7. 7.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
8. 8.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 44 px tall
   Cancel button: 68 px tall
   Send button: 48 px tall
   Start button: 52 px tall (a) Cancel (b) Start (c) Send (d) Next
10. 10.True or false: icons with no meaning is good button design. (a) True (b) False
11. 11.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Send button: 60 px tall
    Next button: 60 px tall
13. 13.True or false: a tiny 20 px button is poor button design. (a) False (b) True
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Back button: 48 px tall
    Save button: 32 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Start button: 48 px tall
    Save button: 44 px tall
    Cancel button: 60 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Save button: 48 px tall
    Back button: 64 px tall
    Cancel button: 60 px tall (a) Next (b) Cancel (c) Save (d) Back
17. 17.True or false: icons with no meaning is poor button design. (a) True (b) False
18. 18.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) pale pink on white (d) light grey on white
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Cancel button: 64 px tall
    Next button: 24 px tall (a) Next (b) Start (c) Cancel
20. 20.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
22. 22.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) black on yellow (d) yellow on white
23. 23.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
24. 24.True or false: a tiny 20 px button is good button design. (a) True (b) False
25. 25.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on pale grey (d) yellow on white
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Back button: 60 px tall
    Send button: 40 px tall
    Cancel button: 44 px tall
28. 28.True or false: buttons almost touching is poor button design. (a) False (b) True
29. 29.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) light grey on white (d) white on black
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Help button: 72 px tall
    Save button: 48 px tall
    Send button: 68 px tall (a) Next (b) Send (c) Help (d) Save
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Start button: 40 px tall
    Save button: 64 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Save button: 32 px tall
    Help button: 64 px tall
    Back button: 40 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Save button: 60 px tall
    Start button: 60 px tall
35. 35.True or false: a big, easy tap area is poor button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Send button: 52 px tall
    Done button: 36 px tall
    Help button: 56 px tall (a) Done (b) Next (c) Help (d) Send
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Send button: 32 px tall
    Done button: 32 px tall
    Save button: 32 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Cancel button: 44 px tall
    Save button: 68 px tall (a) Start (b) Save (c) Cancel
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
40. 40.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read

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