App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 114 · 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 this good or poor button design: icons with no meaning? (a) good design (b) poor design
2. 2.True or false: space between buttons is poor button design. (a) True (b) False
3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
4. 4.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) white on black (d) red on green
5. 5.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) black on yellow (d) pale pink on white
7. 7.True or false: strong colour contrast is poor button design. (a) True (b) False
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 40 px tall
   Help button: 32 px tall
   Send button: 60 px tall
9. 9.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
12. 12.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.True or false: a big, easy tap area is good button design. (a) False (b) True
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Save button: 56 px tall
    Send button: 56 px tall
    Done button: 32 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Next button: 68 px tall
    Start button: 60 px tall
    Send button: 28 px tall (a) Next (b) Start (c) Back (d) Send
16. 16.True or false: icons with no meaning is good button design. (a) True (b) False
17. 17.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) white on dark green (d) pale pink on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
19. 19.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Start button: 32 px tall
    Save button: 32 px tall
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Send button: 52 px tall
    Save button: 48 px tall (a) Send (b) Save (c) Done
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Done button: 48 px tall
    Cancel button: 64 px tall
    Back button: 28 px tall (a) Back (b) Done (c) Help (d) Cancel
23. 23.True or false: strong colour contrast is good button design. (a) True (b) False
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Back button: 56 px tall
    Cancel button: 36 px tall (a) Back (b) Done (c) Cancel
25. 25.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) light grey on white (d) black on pale grey
26. 26.True or false: a clear word like Save is poor button design. (a) True (b) False
27. 27.True or false: buttons almost touching is good button design. (a) False (b) True
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
29. 29.🌗 Is white on black 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. The Back button is 24 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Done button: 68 px tall
    Back button: 44 px tall
    Send button: 56 px tall (a) Cancel (b) Send (c) Back (d) Done
33. 33.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) dark blue on black (d) dark blue on white
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Save button: 40 px tall
    Next button: 40 px tall
    Start button: 56 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
37. 37.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
39. 39.Which colour pair is easy to read? (a) black on pale grey (b) red on green (c) pale pink on white (d) dark blue on black
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Send button: 68 px tall
    Save button: 24 px tall
    Help button: 64 px tall (a) Save (b) Help (c) Done (d) Send

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