App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 210 · 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 tiny 20 px button is poor button design. (a) True (b) False
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 60 px tall
   Cancel button: 36 px tall
   Start button: 56 px tall
3. 3.True or false: a big, easy tap area is good button design. (a) False (b) True
4. 4.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
6. 6.🌗 Is black on yellow 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 clear word like Save? (a) good design (b) poor design
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 64 px tall
   Save button: 56 px tall
   Send button: 36 px tall
   Done button: 40 px tall
10. 10.🌗 Is white on dark green 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: space between buttons? (a) poor design (b) good design
12. 12.True or false: a tiny 20 px button is good button design. (a) False (b) True
13. 13.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.True or false: buttons almost touching is good button design. (a) False (b) True
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
16. 16.Which colour pair is easy to read? (a) white on dark green (b) yellow on white (c) light grey on white (d) red on green
17. 17.True or false: icons with no meaning is poor button design. (a) True (b) False
18. 18.True or false: a clear word like Save is poor button design. (a) False (b) True
19. 19.Which colour pair is hard to read? (a) black on pale grey (b) red on green (c) white on black (d) white on dark green
20. 20.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) black on yellow (d) black on pale grey
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Start button: 40 px tall
    Cancel button: 32 px tall
    Back button: 48 px tall
23. 23.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) dark blue on black (d) black on pale grey
24. 24.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) black on yellow (d) light grey on white
25. 25.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Save button: 32 px tall
    Done button: 36 px tall
    Help button: 32 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
28. 28.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 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?
    Send button: 40 px tall
    Cancel button: 60 px tall
    Next button: 72 px tall (a) Next (b) Send (c) Cancel
31. 31.True or false: a clear word like Save is good button design. (a) True (b) False
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
33. 33.Which colour pair is hard to read? (a) dark blue on white (b) pale pink on white (c) white on black (d) white on dark green
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Save button: 56 px tall
    Next button: 40 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Send button: 64 px tall
    Next button: 72 px tall
    Save button: 72 px tall (a) Next (b) Save (c) Done (d) Send
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Cancel button: 40 px tall
    Start button: 72 px tall
    Send button: 48 px tall (a) Send (b) Next (c) Start (d) Cancel
37. 37.Which colour pair is easy to read? (a) dark blue on black (b) dark blue on white (c) pale pink on white (d) yellow on white
38. 38.True or false: a big, easy tap area is poor button design. (a) False (b) True
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Back button: 68 px tall
    Done button: 36 px tall
    Send button: 72 px tall (a) Cancel (b) Done (c) Send (d) Back
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Cancel button: 24 px tall
    Next button: 60 px tall
    Send button: 52 px tall (a) Start (b) Send (c) Cancel (d) Next

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