App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 157 · 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: strong colour contrast? (a) good design (b) poor design
2. 2.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 48 px tall
   Done button: 32 px tall
   Cancel button: 52 px tall (a) Start (b) Cancel (c) Done
4. 4.True or false: a clear word like Save is poor button design. (a) True (b) False
5. 5.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) white on black (d) pale pink on white
6. 6.True or false: space between buttons is good button design. (a) False (b) True
7. 7.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
8. 8.🔘 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
   Done button: 32 px tall
9. 9.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) light grey on white (d) red on green
11. 11.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.True or false: buttons almost touching is poor button design. (a) False (b) True
13. 13.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Done button: 64 px tall
    Save button: 68 px tall (a) Done (b) Save (c) Send
15. 15.True or false: grey text on grey is poor button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Cancel button: 32 px tall
    Start button: 52 px tall
    Help button: 32 px tall
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Next button: 44 px tall
    Done button: 60 px tall (a) Next (b) Done (c) Cancel
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
19. 19.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
21. 21.True or false: a tiny 20 px button is poor button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Back button: 52 px tall
    Help button: 36 px tall
    Save button: 52 px tall (a) Cancel (b) Help (c) Back (d) Save
24. 24.True or false: space between buttons is poor button design. (a) True (b) False
25. 25.True or false: strong colour contrast is poor button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Back button: 64 px tall
    Help button: 64 px tall
27. 27.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) pale pink on white (d) light grey on white
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Send button: 44 px tall
    Done button: 52 px tall
    Cancel button: 56 px tall
29. 29.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) white on black (d) dark blue on white
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?
    Save button: 64 px tall
    Done button: 68 px tall
    Next button: 72 px tall
    Send button: 40 px tall (a) Next (b) Send (c) Save (d) Done
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Done button: 56 px tall
    Back button: 52 px tall
    Send button: 48 px tall
33. 33.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
34. 34.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Start button: 48 px tall
    Back button: 32 px tall
    Done button: 60 px tall (a) Back (b) Done (c) Start (d) Send
38. 38.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
39. 39.True or false: icons with no meaning is poor button design. (a) True (b) False
40. 40.True or false: a big, easy tap area is good button design. (a) False (b) True

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