App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 317 · 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) easy to read (b) hard to read
2. 2.True or false: grey text on grey is good button design. (a) True (b) False
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 32 px tall
   Cancel button: 52 px tall
   Start button: 68 px tall
   Help button: 68 px tall (a) Start (b) Help (c) Cancel (d) Next
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
5. 5.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) pale pink on white (d) white on black
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 56 px tall
   Save button: 48 px tall
   Back button: 24 px tall
   Done button: 56 px tall (a) Back (b) Done (c) Start (d) Save
7. 7.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 40 px tall
   Send button: 52 px tall
   Next button: 52 px tall
   Help button: 32 px tall
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
11. 11.True or false: strong colour contrast is poor button design. (a) False (b) True
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Done button: 52 px tall
    Start button: 36 px tall
    Back button: 60 px tall (a) Send (b) Done (c) Back (d) Start
13. 13.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) red on green (d) white on dark green
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Start button: 36 px tall
    Save button: 36 px tall
15. 15.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
16. 16.True or false: space between buttons is poor button design. (a) True (b) False
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Help button: 64 px tall
    Next button: 24 px tall
    Back button: 64 px tall (a) Back (b) Next (c) Help (d) Cancel
18. 18.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Back button: 56 px tall
    Done button: 44 px tall
    Start button: 56 px tall (a) Save (b) Back (c) Done (d) Start
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Done button: 48 px tall
    Start button: 44 px tall
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
22. 22.True or false: a clear word like Save is poor button design. (a) True (b) False
23. 23.True or false: space between buttons is good button design. (a) True (b) False
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
25. 25.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
26. 26.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Done button: 40 px tall
    Help button: 52 px tall
28. 28.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) red on green (d) black on pale grey
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Cancel button: 40 px tall
    Help button: 48 px tall
    Done button: 64 px tall (a) Help (b) Next (c) Done (d) Cancel
30. 30.True or false: grey text on grey is poor button design. (a) False (b) True
31. 31.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Done button: 52 px tall
    Save button: 44 px tall
35. 35.True or false: a tiny 20 px button is poor button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Help button: 32 px tall
    Next button: 72 px tall (a) Send (b) Next (c) Help
37. 37.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
38. 38.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?

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