App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 323 · 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. How many of these buttons follow the rule?
   Cancel button: 64 px tall
   Save button: 44 px tall
   Back button: 56 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
3. 3.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 52 px tall
   Send button: 40 px tall
   Start button: 60 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 44 px tall
   Done button: 48 px tall
   Back button: 68 px tall
   Save button: 60 px tall (a) Send (b) Done (c) Save (d) Back
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
7. 7.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) white on dark green (d) red on green
8. 8.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
9. 9.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
10. 10.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) black on yellow (d) yellow on white
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Next button: 60 px tall
    Done button: 36 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
14. 14.True or false: icons with no meaning is good button design. (a) True (b) False
15. 15.True or false: strong colour contrast is poor button design. (a) True (b) False
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Help button: 52 px tall
    Start button: 48 px tall (a) Send (b) Start (c) Help
17. 17.True or false: a tiny 20 px button is good button design. (a) False (b) True
18. 18.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
19. 19.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
21. 21.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
22. 22.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
24. 24.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) yellow on white (d) dark blue on white
25. 25.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.True or false: a clear word like Save is good button design. (a) True (b) False
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Start button: 32 px tall
    Help button: 60 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Next button: 32 px tall
    Send button: 64 px tall
    Back button: 56 px tall (a) Save (b) Next (c) Send (d) Back
29. 29.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
30. 30.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) white on dark green (d) pale pink on white
31. 31.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Next button: 48 px tall
    Save button: 72 px tall
    Back button: 28 px tall (a) Send (b) Back (c) Next (d) Save
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Save button: 28 px tall
    Back button: 72 px tall (a) Save (b) Back (c) Cancel
34. 34.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Send button: 64 px tall
    Done button: 56 px tall
    Next button: 64 px tall (a) Next (b) Done (c) Save (d) Send
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Cancel button: 40 px tall
    Done button: 36 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Cancel button: 52 px tall
    Help button: 28 px tall
    Start button: 72 px tall (a) Help (b) Next (c) Cancel (d) Start
40. 40.True or false: grey text on grey is poor button design. (a) False (b) True

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