App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 79 · 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 this good or poor button design: space between buttons? (a) poor design (b) good design
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
3. 3.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.True or false: strong colour contrast is good button design. (a) False (b) True
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 44 px tall
   Done button: 72 px tall
   Help button: 52 px tall
   Back button: 68 px tall (a) Help (b) Cancel (c) Done (d) Back
6. 6.🌗 Is white on dark green 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. Which button is too small?
   Send button: 28 px tall
   Back button: 60 px tall
   Start button: 52 px tall (a) Send (b) Start (c) Back
8. 8.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) pale pink on white (d) yellow on white
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 44 px tall
   Next button: 68 px tall
   Send button: 60 px tall
   Done button: 68 px tall (a) Done (b) Next (c) Start (d) Send
10. 10.True or false: icons with no meaning is good button design. (a) False (b) True
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Done button: 60 px tall
    Send button: 52 px tall
12. 12.True or false: buttons almost touching is poor button design. (a) True (b) False
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
14. 14.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) black on yellow (d) pale pink on white
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Done button: 36 px tall
    Back button: 48 px tall
    Send button: 60 px tall
16. 16.True or false: a clear word like Save is poor button design. (a) True (b) False
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Save button: 64 px tall
    Start button: 68 px tall (a) Start (b) Send (c) Save
18. 18.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) yellow on white (d) white on dark green
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
20. 20.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) dark blue on black (d) white on dark green
22. 22.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
23. 23.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Back button: 48 px tall
    Next button: 56 px tall
    Save button: 44 px tall (a) Help (b) Save (c) Back (d) Next
25. 25.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) white on black (d) red on green
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Done button: 52 px tall
    Cancel button: 64 px tall
    Start button: 64 px tall (a) Cancel (b) Start (c) Help (d) Done
27. 27.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
29. 29.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
31. 31.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) dark blue on black (d) black on pale grey
32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
33. 33.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Save button: 36 px tall
    Start button: 44 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Next button: 40 px tall
    Cancel button: 60 px tall
37. 37.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Back button: 52 px tall
    Help button: 68 px tall (a) Save (b) Help (c) Back
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Back button: 48 px tall
    Done button: 48 px tall
    Start button: 52 px tall (a) Start (b) Done (c) Next (d) Back

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