App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 469 · 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 pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 56 px tall
   Done button: 52 px tall
   Save button: 40 px tall
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 68 px tall
   Next button: 52 px tall
   Done button: 68 px tall
   Cancel button: 32 px tall (a) Done (b) Next (c) Cancel (d) Send
4. 4.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) light grey on white (d) dark blue on white
5. 5.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 52 px tall
   Send button: 32 px tall
   Cancel button: 52 px tall
   Back button: 32 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 32 px tall
   Done button: 40 px tall
   Help button: 48 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 64 px tall
   Help button: 64 px tall
   Done button: 60 px tall
9. 9.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.True or false: a clear word like Save is poor button design. (a) False (b) True
11. 11.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
12. 12.True or false: strong colour contrast is poor button design. (a) True (b) False
13. 13.True or false: a big, easy tap area is poor button design. (a) False (b) True
14. 14.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
16. 16.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Help button: 72 px tall
    Cancel button: 48 px tall (a) Cancel (b) Help (c) Send
19. 19.True or false: space between buttons is poor button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
22. 22.True or false: a tiny 20 px button is good button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Save button: 56 px tall
    Send button: 48 px tall (a) Save (b) Help (c) Send
25. 25.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
27. 27.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Cancel button: 52 px tall
    Next button: 64 px tall
29. 29.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) yellow on white (d) dark blue on white
30. 30.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
31. 31.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) white on dark green (d) pale pink on white
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Cancel button: 64 px tall
    Start button: 52 px tall (a) Start (b) Help (c) Cancel
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
35. 35.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Help button: 60 px tall
    Next button: 48 px tall
37. 37.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Help button: 60 px tall
    Done button: 36 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
40. 40.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read

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