App Dev Worksheet: Button Size and Contrast

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

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