App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 286 · 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.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
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
3. 3.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 52 px tall
   Next button: 32 px tall
   Back button: 56 px tall
   Done button: 52 px tall
5. 5.True or false: space between buttons is poor button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 64 px tall
   Cancel button: 68 px tall
   Start button: 32 px tall
   Help button: 52 px tall (a) Cancel (b) Help (c) Start (d) Done
7. 7.True or false: icons with no meaning is poor button design. (a) True (b) False
8. 8.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 48 px tall
   Next button: 40 px tall
   Done button: 64 px tall (a) Next (b) Done (c) Back
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Back button: 48 px tall
    Save button: 32 px tall
    Help button: 48 px tall (a) Next (b) Back (c) Save (d) Help
11. 11.True or false: icons with no meaning is good button design. (a) False (b) True
12. 12.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
14. 14.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) dark blue on black (d) pale pink on white
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
18. 18.True or false: a tiny 20 px button is good button design. (a) True (b) False
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Cancel button: 48 px tall
    Done button: 52 px tall
    Save button: 44 px tall (a) Done (b) Next (c) Cancel (d) Save
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
21. 21.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
23. 23.🌗 Is pale pink on white 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. How many of these buttons follow the rule?
    Next button: 36 px tall
    Help button: 60 px tall
    Start button: 56 px tall
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Next button: 60 px tall
    Done button: 48 px tall (a) Next (b) Save (c) Done
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Next button: 36 px tall
    Cancel button: 72 px tall (a) Done (b) Next (c) Cancel
27. 27.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
28. 28.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
29. 29.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.True or false: strong colour contrast is poor button design. (a) True (b) False
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Start button: 48 px tall
    Next button: 60 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Save button: 40 px tall
    Done button: 60 px tall
33. 33.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
34. 34.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) light grey on white (d) dark blue on white
35. 35.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.Which colour pair is hard to read? (a) pale pink on white (b) black on pale grey (c) white on dark green (d) dark blue on white
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Help button: 52 px tall
    Start button: 68 px tall (a) Start (b) Help (c) Save
38. 38.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) red on green (d) white on black
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Next button: 68 px tall
    Send button: 72 px tall (a) Next (b) Cancel (c) Send
40. 40.True or false: a big, easy tap area is poor button design. (a) True (b) False

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