App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 334 · 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. Which button is too small?
   Start button: 32 px tall
   Cancel button: 52 px tall
   Back button: 52 px tall
   Send button: 56 px tall (a) Cancel (b) Back (c) Send (d) Start
2. 2.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 56 px tall
   Save button: 28 px tall
   Next button: 48 px tall (a) Help (b) Next (c) Save
4. 4.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
5. 5.True or false: a tiny 20 px button is good button design. (a) True (b) False
6. 6.True or false: icons with no meaning is good button design. (a) True (b) False
7. 7.Which colour pair is easy to read? (a) dark blue on white (b) red on green (c) pale pink on white (d) yellow on white
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 40 px tall
   Help button: 52 px tall
   Send button: 60 px tall
   Save button: 68 px tall (a) Help (b) Next (c) Send (d) Save
9. 9.Which colour pair is hard to read? (a) white on black (b) red on green (c) black on yellow (d) black on pale grey
10. 10.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.True or false: buttons almost touching is good button design. (a) False (b) True
12. 12.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) white on black (d) yellow on white
14. 14.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
16. 16.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.True or false: strong colour contrast is poor button design. (a) False (b) True
19. 19.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
21. 21.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) light grey on white (d) white on dark green
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Help button: 52 px tall
    Cancel button: 24 px tall (a) Save (b) Help (c) Cancel
23. 23.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.Which colour pair is easy to read? (a) pale pink on white (b) black on pale grey (c) red on green (d) yellow on white
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Back button: 36 px tall
    Save button: 32 px tall
    Send button: 40 px tall
26. 26.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) dark blue on black (d) white on black
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Next button: 48 px tall
    Save button: 28 px tall
    Cancel button: 68 px tall (a) Back (b) Next (c) Save (d) Cancel
28. 28.True or false: a big, easy tap area is poor button design. (a) True (b) False
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Send button: 44 px tall
    Back button: 44 px tall
30. 30.True or false: strong colour contrast is good button design. (a) True (b) False
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Send button: 40 px tall
    Help button: 68 px tall
    Done button: 48 px tall (a) Send (b) Start (c) Help (d) Done
32. 32.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
33. 33.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on black (d) black on yellow
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Back button: 52 px tall
    Send button: 72 px tall (a) Back (b) Cancel (c) Send
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Back button: 40 px tall
    Help button: 52 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Next button: 60 px tall
    Save button: 24 px tall (a) Done (b) Next (c) Save
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Help button: 32 px tall
    Save button: 52 px tall (a) Save (b) Next (c) Help
38. 38.True or false: space between buttons is good button design. (a) True (b) False
39. 39.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.True or false: a big, easy tap area is good button design. (a) True (b) False

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