App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 581 · 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. Which button is too small?
   Cancel button: 72 px tall
   Next button: 36 px tall
   Back button: 72 px tall
   Send button: 52 px tall (a) Next (b) Cancel (c) Send (d) Back
2. 2.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.True or false: buttons almost touching is poor button design. (a) False (b) True
5. 5.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) white on black (d) red on green
6. 6.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
7. 7.True or false: space between buttons is good button design. (a) True (b) False
8. 8.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) white on black (d) dark blue on black
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 68 px tall
   Back button: 28 px tall
   Next button: 56 px tall (a) Done (b) Back (c) Next
10. 10.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Next button: 56 px tall
    Send button: 36 px tall (a) Next (b) Send (c) Start
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Cancel button: 64 px tall
    Save button: 32 px tall (a) Next (b) Cancel (c) Save
14. 14.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
15. 15.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
16. 16.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
17. 17.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Done button: 48 px tall
    Cancel button: 28 px tall (a) Done (b) Start (c) Cancel
19. 19.True or false: a clear word like Save is good button design. (a) True (b) False
20. 20.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
23. 23.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) white on dark green (d) dark blue on black
24. 24.True or false: icons with no meaning is good button design. (a) True (b) False
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Start button: 48 px tall
    Next button: 64 px tall
    Send button: 48 px tall
26. 26.True or false: a tiny 20 px button is good button design. (a) True (b) False
27. 27.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) pale pink on white (d) white on black
28. 28.True or false: a big, easy tap area is good button design. (a) False (b) True
29. 29.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Start button: 64 px tall
    Save button: 40 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 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?
    Done button: 52 px tall
    Next button: 48 px tall
    Help button: 32 px tall (a) Next (b) Help (c) Done
33. 33.True or false: a tiny 20 px button is poor button design. (a) False (b) True
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Cancel button: 40 px tall
    Next button: 64 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Start button: 52 px tall
    Save button: 48 px tall
    Back button: 36 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Cancel button: 48 px tall
    Send button: 36 px tall (a) Send (b) Cancel (c) Done
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Next button: 44 px tall
    Done button: 48 px tall (a) Next (b) Done (c) Send
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Back button: 48 px tall
    Cancel button: 28 px tall (a) Cancel (b) Back (c) Send
39. 39.True or false: a big, easy tap area is poor button design. (a) True (b) False
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Start button: 60 px tall
    Help button: 32 px tall

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