App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 248 · 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.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
2. 2.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 56 px tall
   Save button: 48 px tall
   Send button: 52 px tall
   Next button: 24 px tall (a) Save (b) Help (c) Send (d) Next
5. 5.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) white on dark green (d) pale pink on white
8. 8.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) black on pale grey (d) light grey on white
9. 9.True or false: a clear word like Save is good button design. (a) False (b) True
10. 10.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Start button: 52 px tall
    Next button: 60 px tall
    Back button: 60 px tall (a) Start (b) Back (c) Cancel (d) Next
12. 12.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Back button: 36 px tall
    Help button: 52 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Back button: 40 px tall
    Start button: 64 px tall
    Send button: 40 px tall
15. 15.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
17. 17.True or false: strong colour contrast is good button design. (a) True (b) False
18. 18.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Help button: 48 px tall
    Start button: 60 px tall
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
21. 21.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) light grey on white (d) black on yellow
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Next button: 52 px tall
    Done button: 44 px tall
23. 23.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) dark blue on white (d) light grey on white
25. 25.True or false: buttons almost touching is poor button design. (a) True (b) False
26. 26.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) white on dark green (d) pale pink on white
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Save button: 56 px tall
    Back button: 64 px tall (a) Send (b) Save (c) Back
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Send button: 44 px tall
    Back button: 72 px tall
    Next button: 56 px tall (a) Save (b) Send (c) Back (d) Next
29. 29.True or false: space between buttons is good button design. (a) True (b) False
30. 30.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
31. 31.True or false: space between buttons is poor button design. (a) True (b) False
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Start button: 36 px tall
    Cancel button: 52 px tall
    Back button: 40 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Start button: 52 px tall
    Cancel button: 48 px tall
    Save button: 52 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
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 white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Next button: 44 px tall
    Start button: 60 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Cancel button: 52 px tall
    Next button: 36 px tall
    Back button: 44 px tall
39. 39.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
40. 40.True or false: a clear word like Save is poor button design. (a) True (b) False

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