App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 63 · 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.Which colour pair is hard to read? (a) white on black (b) yellow on white (c) black on pale grey (d) white on dark green
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 40 px tall
   Next button: 48 px tall
   Start button: 56 px tall (a) Start (b) Cancel (c) Next
3. 3.True or false: a tiny 20 px button is poor button design. (a) True (b) False
4. 4.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) white on black (d) white on dark green
5. 5.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on pale grey (d) pale pink on white
6. 6.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
7. 7.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
8. 8.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Done button: 48 px tall
    Help button: 60 px tall
    Start button: 36 px tall (a) Cancel (b) Help (c) Start (d) Done
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Done button: 40 px tall
    Back button: 64 px tall
    Cancel button: 48 px tall
12. 12.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) yellow on white (d) dark blue on black
14. 14.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Cancel button: 56 px tall
    Send button: 40 px tall
16. 16.True or false: space between buttons is good button design. (a) False (b) True
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Back button: 52 px tall
    Send button: 52 px tall
    Next button: 48 px tall (a) Next (b) Back (c) Send (d) Save
18. 18.True or false: strong colour contrast is poor button design. (a) False (b) True
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 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: 44 px tall
    Next button: 48 px tall
    Save button: 64 px tall (a) Next (b) Save (c) Send
21. 21.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
22. 22.True or false: space between buttons is poor button design. (a) False (b) True
23. 23.Which colour pair is easy to read? (a) white on black (b) dark blue on black (c) red on green (d) light grey on white
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
25. 25.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Done button: 64 px tall
    Save button: 60 px tall
    Cancel button: 32 px tall
27. 27.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) black on yellow (d) dark blue on black
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Done button: 52 px tall
    Save button: 36 px tall
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Cancel button: 52 px tall
    Help button: 40 px tall (a) Next (b) Help (c) Cancel
30. 30.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Send button: 24 px tall
    Cancel button: 52 px tall
    Back button: 60 px tall (a) Back (b) Send (c) Save (d) Cancel
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Next button: 60 px tall
    Save button: 32 px tall
    Cancel button: 56 px tall (a) Start (b) Cancel (c) Save (d) Next
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Start button: 56 px tall
    Help button: 60 px tall
    Done button: 64 px tall (a) Help (b) Next (c) Done (d) Start
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
37. 37.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
38. 38.True or false: a clear word like Save is poor button design. (a) False (b) True
39. 39.True or false: a clear word like Save is good button design. (a) False (b) True
40. 40.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read

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