App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 472 · 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: a clear word like Save? (a) poor design (b) good design
2. 2.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 56 px tall
   Cancel button: 64 px tall
   Send button: 36 px tall
4. 4.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
6. 6.True or false: a tiny 20 px button is poor button design. (a) True (b) False
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
8. 8.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
9. 9.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) black on pale grey (d) dark blue on white
10. 10.Which colour pair is easy to read? (a) dark blue on white (b) pale pink on white (c) dark blue on black (d) yellow on white
11. 11.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Help button: 48 px tall
    Next button: 60 px tall (a) Done (b) Help (c) Next
13. 13.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.True or false: grey text on grey is poor button design. (a) True (b) False
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Next button: 40 px tall
    Done button: 32 px tall
    Save button: 32 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Back button: 64 px tall
    Start button: 72 px tall
    Save button: 48 px tall (a) Start (b) Save (c) Back (d) Help
17. 17.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on dark green (d) yellow on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Done button: 56 px tall
    Back button: 40 px tall
    Next button: 64 px tall (a) Back (b) Next (c) Done (d) Save
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Start button: 32 px tall
    Back button: 64 px tall (a) Back (b) Send (c) Start
20. 20.True or false: icons with no meaning is poor button design. (a) False (b) True
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Cancel button: 40 px tall
    Next button: 44 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Done button: 72 px tall
    Save button: 28 px tall (a) Done (b) Help (c) Save
23. 23.Which colour pair is easy to read? (a) light grey on white (b) white on black (c) dark blue on black (d) pale pink on white
24. 24.True or false: strong colour contrast is poor button design. (a) True (b) False
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.True or false: space between buttons is good button design. (a) False (b) True
27. 27.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
29. 29.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Send button: 48 px tall
    Next button: 52 px tall (a) Next (b) Help (c) Send
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Done button: 40 px tall
    Back button: 52 px tall
    Save button: 60 px tall (a) Help (b) Save (c) Back (d) Done
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Cancel button: 44 px tall
    Help button: 68 px tall
    Save button: 60 px tall (a) Save (b) Help (c) Start (d) Cancel
33. 33.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
34. 34.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) yellow on white (d) pale pink on white
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
36. 36.True or false: buttons almost touching is poor button design. (a) True (b) False
37. 37.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Help button: 44 px tall
    Cancel button: 64 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Back button: 48 px tall
    Next button: 44 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?

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