App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 598 · 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: space between buttons is good button design. (a) False (b) True
2. 2.True or false: a clear word like Save is poor button design. (a) False (b) True
3. 3.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
4. 4.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) light grey on white (d) white on dark green
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 28 px tall
   Cancel button: 60 px tall
   Done button: 64 px tall (a) Next (b) Cancel (c) Done
6. 6.🌗 Is light grey on white 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: 56 px tall
   Done button: 52 px tall
   Start button: 40 px tall
   Send button: 72 px tall (a) Done (b) Save (c) Start (d) Send
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 56 px tall
   Start button: 40 px tall
   Back button: 72 px tall (a) Start (b) Next (c) Back
10. 10.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
12. 12.True or false: icons with no meaning is poor button design. (a) False (b) True
13. 13.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
14. 14.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) pale pink on white (d) black on yellow
15. 15.True or false: grey text on grey is good button design. (a) True (b) False
16. 16.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
18. 18.Which colour pair is hard to read? (a) pale pink on white (b) white on dark green (c) black on yellow (d) dark blue on white
19. 19.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) black on yellow (d) dark blue on black
20. 20.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Next button: 60 px tall
    Start button: 56 px tall (a) Back (b) Next (c) Start
23. 23.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Next button: 68 px tall
    Save button: 28 px tall (a) Send (b) Save (c) Next
25. 25.True or false: a tiny 20 px button is good button design. (a) False (b) True
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Send button: 48 px tall
    Save button: 52 px tall
    Start button: 48 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Send button: 40 px tall
    Help button: 52 px tall (a) Send (b) Help (c) Next
28. 28.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) light grey on white (d) black on pale grey
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Help button: 52 px tall
    Cancel button: 32 px tall (a) Cancel (b) Help (c) Save
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Next button: 28 px tall
    Back button: 64 px tall (a) Back (b) Next (c) Save
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Send button: 32 px tall
    Save button: 40 px tall
    Cancel button: 32 px tall
34. 34.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 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?
    Next button: 32 px tall
    Done button: 48 px tall
    Save button: 36 px tall
    Back button: 56 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 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?
    Next button: 48 px tall
    Send button: 32 px tall
    Save button: 56 px tall
    Start button: 72 px tall (a) Next (b) Save (c) Send (d) Start
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Next button: 60 px tall
    Help button: 36 px tall
    Start button: 32 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?

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