App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 309 · 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 Start button is 20 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 68 px tall
   Help button: 48 px tall
   Start button: 28 px tall (a) Cancel (b) Help (c) Start
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
4. 4.True or false: grey text on grey is good button design. (a) False (b) True
5. 5.True or false: icons with no meaning is good button design. (a) True (b) False
6. 6.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) light grey on white (d) white on dark green
7. 7.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
10. 10.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
12. 12.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) light grey on white (d) white on dark green
14. 14.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) black on pale grey (d) pale pink on white
15. 15.True or false: a tiny 20 px button is good button design. (a) True (b) False
16. 16.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.True or false: a big, easy tap area is poor button design. (a) False (b) True
19. 19.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
20. 20.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) black on pale grey (d) pale pink on white
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Start button: 72 px tall
    Help button: 40 px tall
    Save button: 60 px tall (a) Start (b) Save (c) Help (d) Back
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Next button: 48 px tall
    Cancel button: 68 px tall (a) Next (b) Save (c) Cancel
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Send button: 52 px tall
    Start button: 32 px tall
    Back button: 44 px tall
24. 24.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) black on yellow (d) dark blue on black
25. 25.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
26. 26.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on white (d) dark blue on black
27. 27.True or false: icons with no meaning is poor button design. (a) True (b) False
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Save button: 56 px tall
    Cancel button: 56 px tall
    Help button: 36 px tall
29. 29.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Save button: 64 px tall
    Start button: 40 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Help button: 64 px tall
    Next button: 24 px tall
    Save button: 60 px tall (a) Help (b) Send (c) Save (d) Next
32. 32.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Done button: 40 px tall
    Next button: 48 px tall
34. 34.True or false: a clear word like Save is poor button design. (a) True (b) False
35. 35.True or false: strong colour contrast is good button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Back button: 60 px tall
    Help button: 36 px tall
    Done button: 60 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Save button: 40 px tall
    Done button: 36 px tall
    Help button: 64 px tall
38. 38.True or false: buttons almost touching is poor button design. (a) False (b) True
39. 39.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Cancel button: 52 px tall
    Next button: 60 px tall
    Help button: 28 px tall (a) Help (b) Next (c) Cancel (d) Save

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