App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 172 · 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.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 68 px tall
   Cancel button: 32 px tall
   Start button: 64 px tall (a) Start (b) Cancel (c) Back
3. 3.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 68 px tall
   Next button: 36 px tall
   Save button: 52 px tall
   Back button: 64 px tall (a) Cancel (b) Save (c) Back (d) Next
5. 5.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) pale pink on white (d) dark blue on white
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
8. 8.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
9. 9.True or false: space between buttons is poor button design. (a) False (b) True
10. 10.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) red on green (d) black on yellow
11. 11.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) dark blue on black (d) white on black
12. 12.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.True or false: a big, easy tap area is good button design. (a) True (b) False
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Start button: 56 px tall
    Next button: 44 px tall
    Done button: 44 px tall
15. 15.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
16. 16.True or false: buttons almost touching is poor button design. (a) False (b) True
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
18. 18.True or false: icons with no meaning is poor button design. (a) True (b) False
19. 19.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Cancel button: 64 px tall
    Done button: 56 px tall
    Next button: 36 px tall (a) Done (b) Next (c) Cancel (d) Save
21. 21.True or false: strong colour contrast is poor button design. (a) True (b) False
22. 22.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Cancel button: 48 px tall
    Back button: 36 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 24 px tall
    Done button: 68 px tall (a) Done (b) Save (c) Cancel
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Done button: 60 px tall
    Save button: 64 px tall
    Send button: 72 px tall (a) Send (b) Done (c) Save (d) Help
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Done button: 48 px tall
    Send button: 24 px tall
    Start button: 68 px tall (a) Done (b) Send (c) Start (d) Save
28. 28.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Help button: 48 px tall
    Done button: 36 px tall
    Save button: 32 px tall
30. 30.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Send button: 64 px tall
    Help button: 48 px tall
    Start button: 56 px tall (a) Done (b) Start (c) Send (d) Help
33. 33.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
34. 34.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Cancel button: 32 px tall
    Done button: 36 px tall
    Next button: 40 px tall
36. 36.True or false: space between buttons is good button design. (a) False (b) True
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 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?
    Next button: 68 px tall
    Done button: 28 px tall
    Start button: 68 px tall (a) Start (b) Next (c) Done
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Cancel button: 72 px tall
    Done button: 24 px tall (a) Done (b) Start (c) Cancel
40. 40.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design

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