App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 268 · 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 easy to read? (a) white on black (b) dark blue on black (c) pale pink on white (d) light grey on white
2. 2.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.True or false: a clear word like Save is good button design. (a) True (b) False
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.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 40 px tall
   Save button: 44 px tall
   Send button: 36 px tall
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.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Back button: 52 px tall
    Save button: 44 px tall
11. 11.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Next button: 24 px tall
    Save button: 60 px tall
    Start button: 48 px tall (a) Help (b) Start (c) Next (d) Save
14. 14.True or false: a clear word like Save is poor button design. (a) False (b) True
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Done button: 32 px tall
    Help button: 32 px tall
17. 17.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
18. 18.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) red on green (d) white on dark green
19. 19.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Cancel button: 64 px tall
    Next button: 36 px tall
    Done button: 60 px tall (a) Save (b) Done (c) Cancel (d) Next
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Next button: 36 px tall
    Back button: 44 px tall
    Send button: 44 px tall
22. 22.🔘 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
    Send button: 64 px tall
23. 23.True or false: a big, easy tap area is good button design. (a) True (b) False
24. 24.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Start button: 40 px tall
    Back button: 40 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Back button: 32 px tall
    Save button: 68 px tall (a) Save (b) Back (c) Help
27. 27.Which colour pair is hard to read? (a) black on yellow (b) pale pink on white (c) white on dark green (d) black on pale grey
28. 28.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
30. 30.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) pale pink on white (d) yellow on white
31. 31.True or false: grey text on grey is good button design. (a) False (b) True
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
34. 34.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.True or false: buttons almost touching is poor button design. (a) False (b) True
36. 36.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
37. 37.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Send button: 72 px tall
    Back button: 36 px tall (a) Help (b) Back (c) Send
39. 39.True or false: buttons almost touching is good button design. (a) True (b) False
40. 40.True or false: a big, easy tap area is poor button design. (a) False (b) True

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