App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 551 · 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) red on green (b) light grey on white (c) white on black (d) yellow on white
2. 2.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
3. 3.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
4. 4.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
5. 5.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.Which colour pair is hard to read? (a) black on yellow (b) yellow on white (c) dark blue on white (d) black on pale grey
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 40 px tall
   Send button: 56 px tall
   Save button: 36 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 68 px tall
   Save button: 44 px tall
   Start button: 48 px tall (a) Save (b) Start (c) Next
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 48 px tall
   Start button: 48 px tall
   Next button: 64 px tall
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Next button: 64 px tall
    Done button: 28 px tall (a) Done (b) Next (c) Start
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Done button: 72 px tall
    Save button: 68 px tall
    Start button: 32 px tall (a) Save (b) Start (c) Done (d) Back
13. 13.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
14. 14.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
16. 16.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Send button: 40 px tall
    Next button: 60 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Save button: 56 px tall
    Send button: 36 px tall
    Start button: 40 px tall
19. 19.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
20. 20.Which colour pair is hard to read? (a) dark blue on white (b) light grey on white (c) white on black (d) white on dark green
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Start button: 60 px tall
    Next button: 40 px tall
    Help button: 52 px tall (a) Next (b) Help (c) Start (d) Send
22. 22.True or false: strong colour contrast is poor button design. (a) True (b) False
23. 23.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) dark blue on black (d) black on pale grey
24. 24.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Next button: 60 px tall
    Send button: 64 px tall
    Save button: 32 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Save button: 72 px tall
    Back button: 48 px tall
    Cancel button: 48 px tall (a) Back (b) Cancel (c) Save (d) Help
28. 28.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Send button: 56 px tall
    Help button: 60 px tall
    Next button: 56 px tall
30. 30.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Help button: 52 px tall
    Next button: 64 px tall (a) Cancel (b) Help (c) Next
32. 32.True or false: grey text on grey is poor button design. (a) False (b) True
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Start button: 60 px tall
    Send button: 56 px tall
34. 34.True or false: grey text on grey is good button design. (a) False (b) True
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Cancel button: 48 px tall
    Done button: 72 px tall
    Next button: 32 px tall (a) Done (b) Next (c) Cancel (d) Help
37. 37.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.True or false: icons with no meaning is good button design. (a) True (b) False
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Save button: 48 px tall
    Start button: 56 px tall (a) Back (b) Save (c) Start
40. 40.True or false: a clear word like Save is good button design. (a) True (b) False

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