App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 171 · 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: strong colour contrast is good button design. (a) True (b) False
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 40 px tall
   Start button: 56 px tall
   Save button: 60 px tall
   Next button: 44 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 28 px tall
   Done button: 64 px tall
   Save button: 60 px tall (a) Next (b) Done (c) Save
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 48 px tall
   Save button: 72 px tall
   Done button: 48 px tall
   Start button: 32 px tall (a) Save (b) Next (c) Start (d) Done
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 60 px tall
   Next button: 60 px tall
   Send button: 32 px tall (a) Start (b) Next (c) Send
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
9. 9.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Start button: 72 px tall
    Help button: 64 px tall (a) Send (b) Start (c) Help
12. 12.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
14. 14.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) red on green (d) light grey on white
15. 15.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
16. 16.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) yellow on white (d) white on black
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
18. 18.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.True or false: strong colour contrast is poor button design. (a) False (b) True
20. 20.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) black on yellow (d) pale pink on white
21. 21.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) light grey on white (d) dark blue on black
22. 22.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) yellow on white (d) pale pink on white
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Cancel button: 64 px tall
    Start button: 60 px tall
    Back button: 52 px tall
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Back button: 56 px tall
    Help button: 48 px tall
    Send button: 36 px tall (a) Send (b) Help (c) Back (d) Cancel
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Help button: 60 px tall
    Save button: 44 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Help button: 52 px tall
    Start button: 28 px tall (a) Save (b) Start (c) Help
29. 29.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.True or false: a tiny 20 px button is poor button design. (a) True (b) False
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Start button: 40 px tall
    Cancel button: 52 px tall (a) Send (b) Start (c) Cancel
32. 32.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Back button: 48 px tall
    Help button: 60 px tall (a) Back (b) Save (c) Help
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
35. 35.True or false: a big, easy tap area is poor button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Start button: 60 px tall
    Save button: 48 px tall (a) Start (b) Save (c) Send
37. 37.🔘 Is this good or poor button design: strong colour contrast? (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?
    Done button: 64 px tall
    Next button: 32 px tall
    Save button: 60 px tall
39. 39.Which colour pair is hard to read? (a) black on yellow (b) light grey on white (c) black on pale grey (d) white on dark green
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Done button: 28 px tall
    Save button: 52 px tall
    Send button: 56 px tall (a) Save (b) Start (c) Send (d) Done

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