App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 154 · 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. How many of these buttons follow the rule?
   Next button: 40 px tall
   Back button: 36 px tall
   Start button: 60 px tall
   Help button: 52 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
3. 3.True or false: a big, easy tap area is poor button design. (a) True (b) False
4. 4.True or false: grey text on grey is poor button design. (a) False (b) True
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 24 px tall
   Help button: 68 px tall
   Start button: 68 px tall (a) Help (b) Start (c) Send
7. 7.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.True or false: icons with no meaning is poor button design. (a) True (b) False
9. 9.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Cancel button: 60 px tall
    Done button: 56 px tall (a) Next (b) Done (c) Cancel
12. 12.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) red on green (d) white on dark green
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Help button: 40 px tall
    Send button: 32 px tall
    Back button: 40 px tall
14. 14.True or false: strong colour contrast is good button design. (a) False (b) True
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Send button: 44 px tall
    Back button: 32 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
17. 17.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Help button: 48 px tall
    Done button: 60 px tall
    Send button: 36 px tall (a) Help (b) Send (c) Cancel (d) Done
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.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
23. 23.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Help button: 36 px tall
    Save button: 64 px tall
    Done button: 64 px tall
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
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: 28 px tall
    Next button: 48 px tall
    Back button: 68 px tall (a) Cancel (b) Save (c) Next (d) Back
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
29. 29.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Help button: 56 px tall
    Next button: 36 px tall
32. 32.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
34. 34.True or false: a big, easy tap area is good button design. (a) False (b) True
35. 35.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) dark blue on black (d) dark blue on white
36. 36.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Next button: 72 px tall
    Save button: 48 px tall
    Help button: 44 px tall (a) Done (b) Next (c) Help (d) Save
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Done button: 68 px tall
    Next button: 40 px tall
    Save button: 60 px tall (a) Next (b) Cancel (c) Save (d) Done
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
40. 40.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) white on black (d) light grey on white

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