App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 95 · 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 light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.True or false: a clear word like Save is poor button design. (a) True (b) False
3. 3.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.True or false: a tiny 20 px button is good button design. (a) True (b) False
5. 5.True or false: a clear word like Save is good button design. (a) True (b) False
6. 6.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.Which colour pair is hard to read? (a) dark blue on white (b) red on green (c) white on black (d) black on pale grey
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 48 px tall
   Start button: 28 px tall
   Next button: 52 px tall
   Done button: 52 px tall (a) Start (b) Help (c) Done (d) Next
9. 9.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) white on black (d) yellow on white
10. 10.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
11. 11.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
13. 13.True or false: grey text on grey is poor button design. (a) False (b) True
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Next button: 32 px tall
    Done button: 36 px tall
    Send button: 32 px tall
15. 15.True or false: buttons almost touching is poor button design. (a) True (b) False
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Help button: 56 px tall
    Cancel button: 60 px tall (a) Start (b) Help (c) Cancel
18. 18.True or false: a tiny 20 px button is poor button design. (a) False (b) True
19. 19.True or false: grey text on grey is good button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Save button: 36 px tall
    Send button: 52 px tall
21. 21.True or false: strong colour contrast is good button design. (a) True (b) False
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
23. 23.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) black on pale grey (d) dark blue on black
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Next button: 56 px tall
    Start button: 60 px tall (a) Start (b) Next (c) Back
26. 26.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) light grey on white (d) white on dark green
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Back button: 68 px tall
    Cancel button: 24 px tall
    Help button: 72 px tall (a) Help (b) Back (c) Cancel (d) Start
28. 28.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.True or false: space between buttons is good button design. (a) False (b) True
30. 30.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
32. 32.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.True or false: buttons almost touching is good 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?
    Save button: 40 px tall
    Send button: 32 px tall
    Cancel button: 40 px tall
    Start button: 48 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Send button: 32 px tall
    Next button: 48 px tall
    Help button: 68 px tall (a) Help (b) Send (c) Next (d) Save
36. 36.Which colour pair is easy to read? (a) black on pale grey (b) red on green (c) yellow on white (d) pale pink on white
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Done button: 68 px tall
    Send button: 28 px tall
    Save button: 56 px tall (a) Back (b) Save (c) Done (d) Send
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?

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