App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 74 · 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 dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
3. 3.True or false: space between buttons is good button design. (a) False (b) True
4. 4.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
5. 5.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
7. 7.True or false: grey text on grey is good button design. (a) False (b) True
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
10. 10.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) white on black (d) yellow on white
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
12. 12.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Cancel button: 36 px tall
    Help button: 56 px tall
    Start button: 40 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Next button: 36 px tall
    Cancel button: 64 px tall (a) Next (b) Cancel (c) Save
15. 15.True or false: buttons almost touching is good button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
18. 18.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
19. 19.Which colour pair is hard to read? (a) yellow on white (b) dark blue on white (c) white on dark green (d) black on yellow
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
21. 21.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
22. 22.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Back button: 52 px tall
    Next button: 32 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Send button: 68 px tall
    Done button: 28 px tall
    Help button: 48 px tall (a) Help (b) Done (c) Save (d) Send
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Cancel button: 60 px tall
    Back button: 28 px tall
    Send button: 68 px tall (a) Back (b) Start (c) Cancel (d) Send
26. 26.True or false: strong colour contrast is good button design. (a) True (b) False
27. 27.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.True or false: space between buttons is poor button design. (a) False (b) True
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Cancel button: 64 px tall
    Done button: 64 px tall
    Send button: 36 px tall
30. 30.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.Which colour pair is easy to read? (a) dark blue on white (b) light grey on white (c) red on green (d) yellow on white
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Save button: 40 px tall
    Start button: 72 px tall
    Help button: 52 px tall (a) Cancel (b) Help (c) Save (d) Start
33. 33.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) pale pink on white (d) black on yellow
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Cancel button: 64 px tall
    Back button: 64 px tall
35. 35.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) black on pale grey (d) white on dark green
37. 37.Which colour pair is hard to read? (a) white on dark green (b) red on green (c) dark blue on white (d) black on pale grey
38. 38.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Save button: 60 px tall
    Cancel button: 32 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Send button: 64 px tall
    Save button: 36 px tall (a) Back (b) Save (c) Send

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