App Dev Worksheet: Button Size and Contrast

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

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