App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 124 · 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 white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) black on pale grey (d) pale pink on white
3. 3.True or false: buttons almost touching is good button design. (a) False (b) True
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 52 px tall
   Start button: 36 px tall
   Help button: 48 px tall (a) Start (b) Cancel (c) Help
5. 5.Which colour pair is hard to read? (a) dark blue on white (b) dark blue on black (c) black on pale grey (d) black on yellow
6. 6.Which colour pair is hard to read? (a) yellow on white (b) black on pale grey (c) black on yellow (d) white on black
7. 7.True or false: icons with no meaning is poor button design. (a) True (b) False
8. 8.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 48 px tall
   Back button: 56 px tall
   Send button: 64 px tall
   Next button: 44 px tall (a) Save (b) Next (c) Send (d) Back
10. 10.True or false: strong colour contrast is good button design. (a) True (b) False
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Send button: 36 px tall
    Next button: 40 px tall
    Back button: 56 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Save button: 52 px tall
    Next button: 68 px tall (a) Save (b) Help (c) Next
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Send button: 32 px tall
    Cancel button: 40 px tall
14. 14.True or false: a big, easy tap area is poor button design. (a) False (b) True
15. 15.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
16. 16.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
18. 18.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
19. 19.True or false: grey text on grey is poor button design. (a) True (b) False
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Save button: 52 px tall
    Start button: 48 px tall
21. 21.Which colour pair is easy to read? (a) yellow on white (b) white on black (c) red on green (d) light grey on white
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
23. 23.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.Which colour pair is easy to read? (a) red on green (b) white on dark green (c) light grey on white (d) dark blue on black
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Done button: 32 px tall
    Send button: 64 px tall (a) Help (b) Send (c) Done
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Back button: 64 px tall
    Next button: 48 px tall
    Help button: 44 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Help button: 52 px tall
    Next button: 56 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Start button: 64 px tall
    Cancel button: 56 px tall
    Back button: 36 px tall
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Help button: 72 px tall
    Start button: 48 px tall
    Back button: 28 px tall (a) Start (b) Help (c) Back (d) Cancel
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Next button: 32 px tall
    Cancel button: 64 px tall
    Back button: 56 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Back button: 32 px tall
    Next button: 40 px tall
33. 33.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
34. 34.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Cancel button: 72 px tall
    Save button: 36 px tall
    Help button: 52 px tall (a) Save (b) Cancel (c) Help (d) Start
36. 36.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) white on black (d) light grey on white
37. 37.True or false: buttons almost touching is poor button design. (a) False (b) True
38. 38.True or false: a tiny 20 px button is good button design. (a) False (b) True
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Next button: 48 px tall
    Cancel button: 28 px tall (a) Next (b) Cancel (c) Help
40. 40.True or false: a tiny 20 px button is poor button design. (a) True (b) False

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