App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 500 · 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: 32 px tall
   Back button: 44 px tall
   Done button: 44 px tall
2. 2.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 60 px tall
   Done button: 64 px tall
   Help button: 44 px tall
   Send button: 32 px tall
4. 4.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
6. 6.True or false: a tiny 20 px button is good button design. (a) False (b) True
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 72 px tall
   Cancel button: 36 px tall
   Start button: 48 px tall (a) Cancel (b) Start (c) Send
8. 8.True or false: grey text on grey is poor button design. (a) False (b) True
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 64 px tall
   Cancel button: 48 px tall
   Help button: 56 px tall
10. 10.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) dark blue on black (d) white on dark green
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Next button: 48 px tall
    Done button: 60 px tall
    Back button: 44 px tall
13. 13.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
14. 14.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
15. 15.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
16. 16.True or false: space between buttons is good button design. (a) True (b) False
17. 17.True or false: a big, easy tap area is poor button design. (a) True (b) False
18. 18.True or false: strong colour contrast is good button design. (a) False (b) True
19. 19.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) black on yellow (d) white on black
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
24. 24.True or false: grey text on grey is good button design. (a) True (b) False
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Done button: 56 px tall
    Help button: 24 px tall (a) Done (b) Help (c) Next
27. 27.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Send button: 36 px tall
    Next button: 52 px tall
    Help button: 68 px tall (a) Next (b) Send (c) Start (d) Help
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Done button: 36 px tall
    Help button: 64 px tall
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Done button: 64 px tall
    Save button: 52 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Save button: 44 px tall
    Help button: 36 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Cancel button: 40 px tall
    Help button: 64 px tall (a) Help (b) Done (c) Cancel
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Cancel button: 56 px tall
    Done button: 64 px tall (a) Cancel (b) Done (c) Start
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Cancel button: 56 px tall
    Send button: 44 px tall
    Done button: 36 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Next button: 48 px tall
    Send button: 36 px tall (a) Back (b) Send (c) Next
36. 36.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on white (d) pale pink on white
37. 37.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
39. 39.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) white on black (d) light grey on white
40. 40.True or false: a clear word like Save is good button design. (a) False (b) True

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