App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 42 · 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 Help button is 36 px tall. How many px taller must it be?
2. 2.Which colour pair is hard to read? (a) pale pink on white (b) white on black (c) black on pale grey (d) white on dark green
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 48 px tall
   Help button: 60 px tall
   Save button: 52 px tall
4. 4.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) red on green (d) white on black
5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
6. 6.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 64 px tall
   Help button: 40 px tall
   Cancel button: 52 px tall (a) Cancel (b) Back (c) Help
8. 8.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
9. 9.True or false: a tiny 20 px button is poor button design. (a) True (b) False
10. 10.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) dark blue on black (d) white on dark green
11. 11.Which colour pair is easy to read? (a) black on yellow (b) dark blue on black (c) red on green (d) light grey on white
12. 12.True or false: a tiny 20 px button is good button design. (a) False (b) True
13. 13.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on pale grey (d) dark blue on black
14. 14.True or false: a clear word like Save is poor button design. (a) False (b) True
15. 15.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) dark blue on white (d) light grey on white
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Help button: 48 px tall
    Done button: 36 px tall
    Send button: 52 px tall
18. 18.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) yellow on white (d) black on pale grey
19. 19.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Next button: 56 px tall
    Back button: 56 px tall
    Done button: 52 px tall (a) Back (b) Done (c) Send (d) Next
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Send button: 52 px tall
    Save button: 52 px tall (a) Start (b) Save (c) Send
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Done button: 56 px tall
    Help button: 56 px tall
24. 24.True or false: grey text on grey is poor button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Cancel button: 32 px tall
    Done button: 64 px tall
26. 26.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Save button: 32 px tall
    Help button: 56 px tall
    Back button: 52 px tall (a) Help (b) Save (c) Back (d) Cancel
28. 28.🌗 Is light grey 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. Which button is too small?
    Save button: 52 px tall
    Cancel button: 72 px tall
    Done button: 24 px tall
    Next button: 64 px tall (a) Save (b) Cancel (c) Done (d) Next
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Send button: 52 px tall
    Cancel button: 24 px tall
    Start button: 56 px tall (a) Start (b) Back (c) Send (d) Cancel
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Done button: 52 px tall
    Cancel button: 44 px tall
    Help button: 40 px tall
33. 33.True or false: a big, easy tap area is good button design. (a) False (b) True
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 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.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
38. 38.True or false: strong colour contrast is good button design. (a) True (b) False
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Next button: 60 px tall
    Start button: 64 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Next button: 52 px tall
    Back button: 56 px tall (a) Next (b) Back (c) Done

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