App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 553 · 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. The Done button is 36 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 68 px tall
   Back button: 40 px tall
   Cancel button: 64 px tall (a) Cancel (b) Help (c) Back
3. 3.True or false: buttons almost touching is good button design. (a) True (b) False
4. 4.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) white on dark green (d) red on green
5. 5.Which colour pair is hard to read? (a) pale pink on white (b) white on dark green (c) black on pale grey (d) white on black
6. 6.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.True or false: a tiny 20 px button is good button design. (a) False (b) True
8. 8.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.True or false: strong colour contrast is good button design. (a) False (b) True
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Save button: 36 px tall
    Cancel button: 56 px tall
    Done button: 64 px tall (a) Cancel (b) Back (c) Save (d) Done
11. 11.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
13. 13.True or false: a tiny 20 px button is poor button design. (a) True (b) False
14. 14.True or false: a big, easy tap area is good button design. (a) False (b) True
15. 15.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.True or false: a clear word like Save is good button design. (a) False (b) True
18. 18.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) light grey on white (d) black on pale grey
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Done button: 56 px tall
    Cancel button: 68 px tall
    Back button: 40 px tall (a) Done (b) Send (c) Cancel (d) Back
21. 21.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
22. 22.True or false: space between buttons is good button design. (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Send button: 40 px tall
    Start button: 40 px tall
    Save button: 36 px tall
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.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Start button: 36 px tall
    Save button: 72 px tall
    Back button: 64 px tall (a) Start (b) Back (c) Save (d) Help
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Next button: 64 px tall
    Back button: 28 px tall (a) Back (b) Send (c) Next
30. 30.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) black on pale grey (d) light grey on white
31. 31.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Cancel button: 60 px tall
    Done button: 48 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Save button: 64 px tall
    Next button: 44 px tall (a) Next (b) Save (c) Cancel
34. 34.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) red on green (d) white on black
35. 35.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) dark blue on white (d) pale pink on white
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Done button: 56 px tall
    Back button: 32 px tall
    Next button: 72 px tall (a) Save (b) Back (c) Next (d) Done
37. 37.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) yellow on white (d) white on dark green
38. 38.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Send button: 40 px tall
    Done button: 56 px tall (a) Save (b) Done (c) Send

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