App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 618 · 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 black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 56 px tall
   Back button: 40 px tall
   Done button: 60 px tall
   Start button: 52 px tall (a) Done (b) Cancel (c) Back (d) Start
3. 3.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
4. 4.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 64 px tall
   Done button: 36 px tall
   Save button: 48 px tall
6. 6.Which colour pair is hard to read? (a) dark blue on white (b) dark blue on black (c) white on dark green (d) black on yellow
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
8. 8.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 48 px tall
   Done button: 40 px tall
   Save button: 52 px tall
   Back button: 48 px tall (a) Cancel (b) Done (c) Back (d) Save
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Next button: 64 px tall
    Send button: 72 px tall (a) Next (b) Send (c) Help
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Back button: 72 px tall
    Done button: 56 px tall (a) Cancel (b) Back (c) Done
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Cancel button: 56 px tall
    Next button: 40 px tall
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Cancel button: 56 px tall
    Next button: 56 px tall
    Done button: 40 px tall
17. 17.Which colour pair is hard to read? (a) pale pink on white (b) black on yellow (c) white on black (d) white on dark green
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Next button: 56 px tall
    Help button: 36 px tall
    Back button: 32 px tall
20. 20.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) light grey on white (d) white on black
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Done button: 64 px tall
    Next button: 72 px tall
    Start button: 72 px tall (a) Next (b) Save (c) Start (d) Done
23. 23.Which colour pair is easy to read? (a) black on yellow (b) dark blue on black (c) yellow on white (d) light grey on white
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Send button: 64 px tall
    Save button: 40 px tall
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 60 px tall
    Done button: 56 px tall
    Send button: 24 px tall (a) Send (b) Cancel (c) Save (d) Done
26. 26.True or false: space between buttons is good button design. (a) True (b) False
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Save button: 40 px tall
    Help button: 60 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
29. 29.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
31. 31.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
32. 32.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
34. 34.True or false: grey text on grey is poor button design. (a) True (b) False
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. Which button is too small?
    Send button: 68 px tall
    Help button: 68 px tall
    Save button: 28 px tall
    Done button: 68 px tall (a) Help (b) Done (c) Send (d) Save
37. 37.True or false: icons with no meaning is good button design. (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
40. 40.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) pale pink on white (d) white on dark green

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