App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 425 · 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: a tiny 20 px button? (a) good design (b) poor design
2. 2.True or false: a tiny 20 px button is good button design. (a) True (b) False
3. 3.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on black (d) white on dark green
4. 4.True or false: strong colour contrast is good button design. (a) True (b) False
5. 5.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 56 px tall
   Cancel button: 40 px tall
   Next button: 44 px tall
   Done button: 60 px tall
7. 7.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
8. 8.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 56 px tall
   Save button: 64 px tall
   Cancel button: 40 px tall (a) Save (b) Cancel (c) Back
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Save button: 64 px tall
    Next button: 32 px tall
    Send button: 64 px tall (a) Send (b) Next (c) Start (d) Save
11. 11.True or false: a clear word like Save is poor button design. (a) False (b) True
12. 12.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) white on dark green (d) yellow on white
13. 13.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Send button: 44 px tall
    Next button: 48 px tall
    Cancel button: 32 px tall
15. 15.True or false: space between buttons is good button design. (a) True (b) False
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Back button: 60 px tall
    Send button: 56 px tall
18. 18.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Back button: 64 px tall
    Start button: 64 px tall
20. 20.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Done button: 64 px tall
    Save button: 48 px tall
22. 22.Which colour pair is easy to read? (a) black on pale grey (b) dark blue on black (c) red on green (d) yellow on white
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Save button: 28 px tall
    Back button: 60 px tall (a) Help (b) Back (c) Save
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
25. 25.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) red on green (d) dark blue on white
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Save button: 48 px tall
    Next button: 48 px tall
    Back button: 40 px tall (a) Help (b) Save (c) Back (d) Next
27. 27.True or false: space between buttons is poor button design. (a) True (b) False
28. 28.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
29. 29.True or false: buttons almost touching is poor button design. (a) False (b) True
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Save button: 52 px tall
    Next button: 32 px tall
    Cancel button: 52 px tall
31. 31.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on yellow (d) light grey on white
32. 32.True or false: buttons almost touching is good button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Send button: 64 px tall
    Save button: 52 px tall
34. 34.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
36. 36.Which colour pair is hard to read? (a) white on black (b) red on green (c) black on yellow (d) dark blue on white
37. 37.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) light grey on white (d) white on black
38. 38.Which colour pair is easy to read? (a) black on yellow (b) yellow on white (c) red on green (d) dark blue on black
39. 39.True or false: icons with no meaning is poor button design. (a) True (b) False
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Back button: 64 px tall
    Cancel button: 48 px tall (a) Back (b) Cancel (c) Help

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