App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 526 · 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 tiny 20 px button? (a) good design (b) poor design
2. 2.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 48 px tall
   Help button: 64 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?
   Help button: 48 px tall
   Save button: 56 px tall
   Done button: 40 px tall
   Start button: 60 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
6. 6.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 72 px tall
   Done button: 56 px tall
   Next button: 40 px tall (a) Done (b) Next (c) Save
8. 8.True or false: space between buttons is poor button design. (a) True (b) False
9. 9.🌗 Is black on pale grey 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. Which button is too small?
    Next button: 60 px tall
    Save button: 52 px tall
    Cancel button: 28 px tall
    Send button: 68 px tall (a) Send (b) Cancel (c) Next (d) Save
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Help button: 32 px tall
    Cancel button: 44 px tall
12. 12.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
13. 13.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.True or false: a clear word like Save is poor button design. (a) True (b) False
15. 15.True or false: buttons almost touching is good button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
17. 17.True or false: buttons almost touching is poor button design. (a) True (b) False
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
19. 19.True or false: icons with no meaning is poor button design. (a) True (b) False
20. 20.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.True or false: a big, easy tap area is good button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Done button: 56 px tall
    Help button: 40 px tall (a) Send (b) Done (c) Help
23. 23.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on yellow (d) light grey on white
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Done button: 72 px tall
    Cancel button: 28 px tall (a) Done (b) Cancel (c) Save
25. 25.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Send button: 60 px tall
    Help button: 56 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
28. 28.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Help button: 60 px tall
    Send button: 56 px tall (a) Help (b) Send (c) Cancel
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Save button: 60 px tall
    Cancel button: 60 px tall
    Start button: 40 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Save button: 44 px tall
    Send button: 60 px tall
    Back button: 44 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Help button: 72 px tall
    Next button: 52 px tall
    Back button: 64 px tall (a) Help (b) Next (c) Back (d) Done
33. 33.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
35. 35.True or false: grey text on grey is good button design. (a) True (b) False
36. 36.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) red on green (d) white on dark green
37. 37.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Start button: 48 px tall
    Help button: 40 px tall
39. 39.Which colour pair is hard to read? (a) pale pink on white (b) black on yellow (c) black on pale grey (d) white on dark green
40. 40.True or false: a clear word like Save is good button design. (a) False (b) True

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