App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 106 · 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?
   Save button: 48 px tall
   Done button: 40 px tall
   Back button: 52 px tall
   Send button: 36 px tall
2. 2.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
3. 3.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) black on pale grey (d) dark blue on black
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 60 px tall
   Next button: 44 px tall
   Back button: 52 px tall
   Save button: 48 px tall (a) Help (b) Next (c) Back (d) Save
5. 5.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.True or false: a big, easy tap area is good button design. (a) False (b) True
7. 7.True or false: space between buttons is poor button design. (a) False (b) True
8. 8.True or false: buttons almost touching is good button design. (a) True (b) False
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 68 px tall
   Help button: 36 px tall
   Start button: 52 px tall (a) Done (b) Help (c) Start
10. 10.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
11. 11.Which colour pair is easy to read? (a) white on black (b) pale pink on white (c) dark blue on black (d) light grey on white
12. 12.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) black on pale grey (d) pale pink on white
13. 13.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Done button: 56 px tall
    Start button: 36 px tall
16. 16.Which colour pair is hard to read? (a) yellow on white (b) black on pale grey (c) white on dark green (d) dark blue on white
17. 17.True or false: space between buttons is good button design. (a) True (b) False
18. 18.True or false: icons with no meaning is poor button design. (a) True (b) False
19. 19.Which colour pair is easy to read? (a) black on yellow (b) pale pink on white (c) light grey on white (d) yellow on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Cancel button: 60 px tall
    Start button: 72 px tall
    Send button: 36 px tall (a) Send (b) Help (c) Start (d) Cancel
21. 21.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
25. 25.True or false: a big, easy tap area is poor button design. (a) True (b) False
26. 26.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
27. 27.Which colour pair is hard to read? (a) white on black (b) light grey on white (c) black on yellow (d) black on pale grey
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Start button: 40 px tall
    Send button: 60 px tall
    Save button: 56 px tall (a) Save (b) Help (c) Start (d) Send
29. 29.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Help button: 48 px tall
    Save button: 48 px tall
    Start button: 48 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Done button: 40 px tall
    Send button: 40 px tall
    Save button: 60 px tall
32. 32.True or false: a tiny 20 px button is poor button design. (a) False (b) True
33. 33.True or false: a clear word like Save is good button design. (a) False (b) True
34. 34.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Help button: 60 px tall
    Cancel button: 32 px tall
    Back button: 64 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Start button: 40 px tall
    Save button: 32 px tall
38. 38.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on dark green (d) red on green
39. 39.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
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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