App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 207 · 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.True or false: a clear word like Save is poor button design. (a) False (b) True
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 40 px tall
   Done button: 48 px tall
   Help button: 56 px tall
   Send button: 52 px tall (a) Done (b) Send (c) Cancel (d) Help
3. 3.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 56 px tall
   Cancel button: 64 px tall
   Start button: 32 px tall
   Next button: 56 px tall
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.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
7. 7.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 60 px tall
   Save button: 24 px tall
   Cancel button: 52 px tall (a) Save (b) Next (c) Cancel
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.Which colour pair is easy to read? (a) white on black (b) pale pink on white (c) red on green (d) light grey on white
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
12. 12.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
13. 13.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
14. 14.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.True or false: icons with no meaning is good button design. (a) False (b) True
16. 16.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) black on pale grey (d) red on green
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Save button: 52 px tall
    Help button: 44 px tall
18. 18.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
19. 19.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
20. 20.True or false: icons with no meaning is poor button design. (a) False (b) True
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
22. 22.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on yellow (d) yellow on white
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Help button: 52 px tall
    Save button: 40 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Next button: 60 px tall
    Cancel button: 52 px tall
    Back button: 36 px tall (a) Cancel (b) Back (c) Next (d) Send
25. 25.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Next button: 48 px tall
    Save button: 52 px tall
    Start button: 44 px tall
27. 27.🌗 Is red on 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: 68 px tall
    Next button: 36 px tall
    Help button: 60 px tall
    Done button: 72 px tall (a) Help (b) Done (c) Next (d) Start
29. 29.True or false: strong colour contrast is poor button design. (a) False (b) True
30. 30.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) pale pink on white (d) white on black
31. 31.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.True or false: a big, easy tap area is poor button design. (a) True (b) False
33. 33.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) pale pink on white (d) black on pale grey
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Help button: 64 px tall
    Back button: 56 px tall
    Next button: 64 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Back button: 24 px tall
    Next button: 56 px tall
    Start button: 48 px tall (a) Start (b) Back (c) Send (d) Next
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Cancel button: 48 px tall
    Save button: 48 px tall (a) Start (b) Save (c) Cancel
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Done button: 36 px tall
    Send button: 52 px tall

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