App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 513 · 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.True or false: a big, easy tap area is poor button design. (a) False (b) True
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 60 px tall
   Back button: 60 px tall
   Start button: 64 px tall
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
4. 4.True or false: a tiny 20 px button is good button design. (a) False (b) True
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 60 px tall
   Send button: 52 px tall
   Next button: 60 px tall
   Start button: 64 px tall
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
7. 7.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
9. 9.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Send button: 52 px tall
    Save button: 52 px tall (a) Save (b) Start (c) Send
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
12. 12.Which colour pair is easy to read? (a) yellow on white (b) black on pale grey (c) dark blue on black (d) red on green
13. 13.True or false: buttons almost touching is good button design. (a) False (b) True
14. 14.True or false: a big, easy tap area is good button design. (a) True (b) False
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Send button: 48 px tall
    Save button: 64 px tall
16. 16.True or false: strong colour contrast is good button design. (a) True (b) False
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Next button: 48 px tall
    Cancel button: 32 px tall
18. 18.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
19. 19.True or false: icons with no meaning is good button design. (a) True (b) False
20. 20.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Next button: 32 px tall
    Help button: 44 px tall
    Cancel button: 40 px tall
22. 22.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Cancel button: 64 px tall
    Start button: 28 px tall
    Done button: 60 px tall (a) Save (b) Start (c) Done (d) Cancel
25. 25.True or false: space between buttons is good button design. (a) True (b) False
26. 26.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) red on green (d) light grey on white
27. 27.True or false: grey text on grey is good button design. (a) True (b) False
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Help button: 48 px tall
    Save button: 68 px tall (a) Help (b) Back (c) Save
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
30. 30.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) white on dark green (d) red on green
31. 31.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
34. 34.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Start button: 28 px tall
    Cancel button: 60 px tall
    Back button: 56 px tall (a) Help (b) Cancel (c) Back (d) Start
37. 37.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Done button: 72 px tall
    Help button: 48 px tall
    Back button: 48 px tall (a) Done (b) Help (c) Back (d) Cancel
40. 40.True or false: grey text on grey is poor button design. (a) False (b) True

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