App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 155 · 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. Which button is too small?
   Help button: 60 px tall
   Save button: 60 px tall
   Send button: 44 px tall (a) Save (b) Send (c) Help
2. 2.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 52 px tall
   Cancel button: 36 px tall
   Start button: 48 px tall
   Next button: 40 px tall
4. 4.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) red on green (d) dark blue on white
5. 5.True or false: a clear word like Save is poor button design. (a) False (b) True
6. 6.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
8. 8.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
11. 11.True or false: strong colour contrast is poor button design. (a) False (b) True
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
13. 13.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
14. 14.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on yellow (d) light grey on white
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Start button: 48 px tall
    Save button: 48 px tall (a) Start (b) Save (c) Help
16. 16.True or false: icons with no meaning is poor button design. (a) False (b) True
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Back button: 72 px tall
    Done button: 44 px tall (a) Send (b) Done (c) Back
18. 18.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
19. 19.True or false: buttons almost touching is good button design. (a) False (b) True
20. 20.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) dark blue on black (d) yellow on white
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Send button: 64 px tall
    Next button: 60 px tall
    Done button: 52 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Done button: 68 px tall
    Back button: 68 px tall (a) Back (b) Save (c) Done
23. 23.True or false: a big, easy tap area is poor button design. (a) True (b) False
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Save button: 52 px tall
    Back button: 32 px tall
    Cancel button: 68 px tall (a) Cancel (b) Back (c) Save (d) Start
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Start button: 40 px tall
    Back button: 56 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Send button: 56 px tall
    Next button: 40 px tall
    Back button: 60 px tall (a) Send (b) Next (c) Back (d) Cancel
28. 28.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Save button: 24 px tall
    Done button: 52 px tall
    Next button: 64 px tall (a) Done (b) Next (c) Save (d) Start
30. 30.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 36 px tall
    Save button: 52 px tall
    Next button: 52 px tall (a) Next (b) Save (c) Start
33. 33.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Back button: 40 px tall
    Start button: 52 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Done button: 48 px tall
    Next button: 48 px tall (a) Done (b) Cancel (c) Next
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Done button: 28 px tall
    Send button: 72 px tall
    Help button: 48 px tall (a) Send (b) Done (c) Cancel (d) Help
39. 39.True or false: buttons almost touching is poor button design. (a) True (b) False
40. 40.True or false: space between buttons is poor button design. (a) True (b) False

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