App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 223 · 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 pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.True or false: a big, easy tap area is poor button design. (a) False (b) True
3. 3.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
6. 6.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) pale pink on white (d) white on black
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 44 px tall
   Send button: 68 px tall
   Next button: 56 px tall
   Help button: 48 px tall (a) Next (b) Help (c) Done (d) Send
8. 8.True or false: icons with no meaning is good button design. (a) False (b) True
9. 9.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.Which colour pair is hard to read? (a) light grey on white (b) dark blue on white (c) white on black (d) black on pale grey
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
12. 12.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Back button: 40 px tall
    Start button: 64 px tall
    Cancel button: 64 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Cancel button: 48 px tall
    Next button: 60 px tall
    Save button: 72 px tall (a) Cancel (b) Next (c) Save (d) Done
16. 16.Which colour pair is easy to read? (a) black on yellow (b) yellow on white (c) red on green (d) pale pink on white
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Save button: 64 px tall
    Start button: 40 px tall
    Back button: 44 px tall
18. 18.True or false: strong colour contrast is poor button design. (a) True (b) False
19. 19.True or false: a big, easy tap area is good button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Next button: 68 px tall
    Cancel button: 52 px tall (a) Next (b) Cancel (c) Save
21. 21.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
22. 22.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.True or false: a tiny 20 px button is good button design. (a) True (b) False
24. 24.True or false: space between buttons is poor button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
26. 26.True or false: strong colour contrast is good button design. (a) True (b) False
27. 27.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Next button: 32 px tall
    Cancel button: 48 px tall
29. 29.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) red on green (d) black on pale grey
30. 30.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Done button: 68 px tall
    Save button: 72 px tall (a) Done (b) Help (c) Save
32. 32.True or false: icons with no meaning is poor button design. (a) False (b) True
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Cancel button: 24 px tall
    Send button: 64 px tall (a) Cancel (b) Send (c) Start
34. 34.Which colour pair is easy to read? (a) white on dark green (b) pale pink on white (c) light grey on white (d) yellow on white
35. 35.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) black on pale grey (d) light grey on white
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Cancel button: 64 px tall
    Done button: 52 px tall
    Help button: 28 px tall (a) Cancel (b) Send (c) Help (d) Done
37. 37.True or false: buttons almost touching is good button design. (a) True (b) False
38. 38.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Back button: 32 px tall
    Next button: 52 px tall
    Start button: 64 px tall (a) Back (b) Save (c) Start (d) Next
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Help button: 40 px tall
    Send button: 56 px tall
    Next button: 44 px tall

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