App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 633 · 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: 40 px tall
   Help button: 56 px tall
   Send button: 52 px tall
   Next button: 64 px tall (a) Send (b) Next (c) Help (d) Start
2. 2.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) pale pink on white (d) dark blue on white
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 64 px tall
   Done button: 36 px tall
   Save button: 48 px tall
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 52 px tall
   Cancel button: 32 px tall
   Start button: 44 px tall
   Save button: 36 px tall
5. 5.True or false: strong colour contrast is poor button design. (a) False (b) True
6. 6.Which colour pair is hard to read? (a) dark blue on white (b) red on green (c) white on dark green (d) black on yellow
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 52 px tall
   Back button: 56 px tall
   Save button: 36 px tall
   Start button: 48 px tall
8. 8.True or false: a clear word like Save is good button design. (a) True (b) False
9. 9.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Back button: 32 px tall
    Next button: 48 px tall
    Send button: 64 px tall
11. 11.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) white on dark green (d) pale pink on white
12. 12.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Start button: 52 px tall
    Done button: 64 px tall
    Save button: 52 px tall
14. 14.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.True or false: space between buttons is poor button design. (a) True (b) False
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Start button: 64 px tall
    Done button: 36 px tall
    Back button: 52 px tall (a) Cancel (b) Start (c) Done (d) Back
18. 18.True or false: buttons almost touching is poor button design. (a) False (b) True
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Back button: 64 px tall
    Done button: 56 px tall
    Cancel button: 48 px tall (a) Back (b) Send (c) Cancel (d) Done
20. 20.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Send button: 36 px tall
    Save button: 56 px tall
    Cancel button: 68 px tall (a) Done (b) Cancel (c) Send (d) Save
22. 22.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) white on dark green (d) white on black
24. 24.🔘 Is this good or poor button design: a clear word like Save? (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?
    Start button: 40 px tall
    Send button: 44 px tall
    Save button: 48 px tall
    Cancel button: 52 px tall
26. 26.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Cancel button: 60 px tall
    Save button: 60 px tall (a) Save (b) Next (c) Cancel
28. 28.True or false: strong colour contrast is good button design. (a) True (b) False
29. 29.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Next button: 52 px tall
    Start button: 56 px tall
    Save button: 56 px tall
31. 31.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
34. 34.Which colour pair is hard to read? (a) dark blue on white (b) yellow on white (c) black on pale grey (d) black on yellow
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Done button: 52 px tall
    Send button: 40 px tall
37. 37.True or false: space between buttons is good button design. (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Send button: 32 px tall
    Save button: 48 px tall
    Help button: 36 px tall
40. 40.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design

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