App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 181 · 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.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 60 px tall
   Done button: 36 px tall
   Start button: 40 px tall
4. 4.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) red on green (d) black on yellow
5. 5.True or false: strong colour contrast is good button design. (a) True (b) False
6. 6.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
9. 9.Which colour pair is hard to read? (a) red on green (b) white on black (c) white on dark green (d) dark blue on white
10. 10.True or false: icons with no meaning is good button design. (a) False (b) True
11. 11.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) dark blue on white (d) light grey on white
12. 12.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
13. 13.True or false: a big, easy tap area is poor button design. (a) False (b) True
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Next button: 32 px tall
    Save button: 64 px tall (a) Save (b) Done (c) Next
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Start button: 56 px tall
    Cancel button: 52 px tall (a) Cancel (b) Start (c) Back
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Next button: 72 px tall
    Help button: 28 px tall (a) Cancel (b) Help (c) Next
17. 17.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) black on pale grey (d) light grey on white
18. 18.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🌗 Is red on green 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) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Send button: 56 px tall
    Start button: 32 px tall (a) Start (b) Send (c) Next
23. 23.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Next button: 40 px tall
    Done button: 40 px tall
    Help button: 64 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Save button: 48 px tall
    Cancel button: 36 px tall
28. 28.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on yellow (d) pale pink on white
29. 29.True or false: a tiny 20 px button is good button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Start button: 64 px tall
    Send button: 40 px tall (a) Back (b) Start (c) Send
31. 31.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) dark blue on white (d) red on green
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Send button: 68 px tall
    Save button: 36 px tall
    Done button: 64 px tall (a) Done (b) Cancel (c) Send (d) Save
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
34. 34.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.True or false: buttons almost touching is good button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Start button: 60 px tall
    Send button: 52 px tall (a) Cancel (b) Start (c) Send
37. 37.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.True or false: space between buttons is poor button design. (a) False (b) True
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Cancel button: 40 px tall
    Done button: 60 px tall
    Save button: 36 px tall
40. 40.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read

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