App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 511 · 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 good button design. (a) True (b) False
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 56 px tall
   Start button: 28 px tall
   Help button: 52 px tall
   Done button: 52 px tall (a) Next (b) Start (c) Help (d) Done
3. 3.🌗 Is dark blue on white 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. The Help button is 28 px tall. How many px taller must it be?
5. 5.True or false: icons with no meaning is good button design. (a) False (b) True
6. 6.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) red on green (d) dark blue on white
7. 7.True or false: a clear word like Save is good button design. (a) False (b) True
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
10. 10.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Back button: 36 px tall
    Help button: 56 px tall
    Cancel button: 32 px tall
12. 12.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
15. 15.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.Which colour pair is easy to read? (a) dark blue on black (b) white on dark green (c) yellow on white (d) light grey on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Done button: 72 px tall
    Help button: 68 px tall (a) Done (b) Help (c) Cancel
19. 19.True or false: buttons almost touching is good button design. (a) True (b) False
20. 20.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Back button: 48 px tall
    Next button: 24 px tall (a) Back (b) Next (c) Done
22. 22.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on pale grey (d) light grey on white
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Cancel button: 32 px tall
    Start button: 36 px tall
    Send button: 56 px tall
26. 26.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Done button: 64 px tall
    Start button: 48 px tall
    Help button: 28 px tall (a) Start (b) Help (c) Send (d) Done
28. 28.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) yellow on white (d) black on pale grey
29. 29.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Next button: 52 px tall
    Done button: 72 px tall (a) Send (b) Next (c) Done
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Save button: 36 px tall
    Done button: 68 px tall
    Help button: 72 px tall (a) Save (b) Done (c) Help (d) Send
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Back button: 44 px tall
    Done button: 56 px tall (a) Done (b) Back (c) Next
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Back button: 36 px tall
    Start button: 40 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
35. 35.True or false: a tiny 20 px button is good button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
37. 37.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.Which colour pair is easy to read? (a) white on black (b) pale pink on white (c) light grey on white (d) red on green
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Save button: 52 px tall
    Cancel button: 64 px tall
    Help button: 64 px tall
40. 40.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design

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