App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 558 · 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) pale pink on white (b) red on green (c) dark blue on black (d) black on pale grey
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 60 px tall
   Save button: 52 px tall
   Done button: 44 px tall
3. 3.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
5. 5.True or false: buttons almost touching is good button design. (a) False (b) True
6. 6.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 36 px tall
   Done button: 44 px tall
   Save button: 40 px tall
   Send button: 60 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 44 px tall
   Done button: 72 px tall
   Start button: 72 px tall (a) Done (b) Save (c) Start
9. 9.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Done button: 28 px tall
    Save button: 64 px tall
    Cancel button: 52 px tall (a) Help (b) Done (c) Cancel (d) Save
11. 11.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Save button: 48 px tall
    Done button: 44 px tall
    Help button: 60 px tall (a) Next (b) Save (c) Help (d) Done
13. 13.True or false: a big, easy tap area is good button design. (a) False (b) True
14. 14.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.Which colour pair is easy to read? (a) black on yellow (b) pale pink on white (c) yellow on white (d) light grey on white
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
18. 18.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) red on green (d) black on yellow
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Send button: 40 px tall
    Back button: 52 px tall
    Done button: 40 px tall
20. 20.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
21. 21.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) white on dark green (d) pale pink on white
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
25. 25.True or false: a clear word like Save is poor button design. (a) True (b) False
26. 26.True or false: grey text on grey is good button design. (a) False (b) True
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Next button: 68 px tall
    Back button: 48 px tall (a) Back (b) Next (c) Save
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Help button: 36 px tall
    Save button: 68 px tall (a) Help (b) Next (c) Save
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Next button: 56 px tall
    Cancel button: 56 px tall
30. 30.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
31. 31.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Back button: 64 px tall
    Help button: 32 px tall (a) Back (b) Help (c) Save
34. 34.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
36. 36.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
39. 39.True or false: grey text on grey is poor button design. (a) False (b) True
40. 40.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read

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