App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 122 · 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.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
2. 2.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 72 px tall
   Cancel button: 36 px tall
   Back button: 52 px tall (a) Cancel (b) Done (c) Back
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 72 px tall
   Cancel button: 48 px tall
   Back button: 44 px tall (a) Back (b) Next (c) Cancel
5. 5.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 52 px tall
   Cancel button: 40 px tall
   Save button: 36 px tall
   Next button: 32 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
9. 9.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
11. 11.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) yellow on white (d) dark blue on white
12. 12.True or false: strong colour contrast is poor button design. (a) False (b) True
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Help button: 32 px tall
    Start button: 60 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Save button: 44 px tall
    Cancel button: 56 px tall
    Back button: 64 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Help button: 24 px tall
    Save button: 56 px tall (a) Save (b) Help (c) Cancel
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Start button: 56 px tall
    Cancel button: 32 px tall (a) Cancel (b) Help (c) Start
18. 18.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) pale pink on white (d) black on pale grey
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
21. 21.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) light grey on white (d) dark blue on white
22. 22.True or false: a big, easy tap area is poor button design. (a) True (b) False
23. 23.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
24. 24.True or false: a clear word like Save is good button design. (a) True (b) False
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
26. 26.True or false: space between buttons is poor button design. (a) False (b) True
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Back button: 52 px tall
    Done button: 44 px tall
28. 28.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Cancel button: 44 px tall
    Start button: 48 px tall (a) Cancel (b) Start (c) Save
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
31. 31.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Back button: 44 px tall
    Next button: 52 px tall
    Send button: 60 px tall (a) Send (b) Next (c) Cancel (d) Back
33. 33.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Next button: 60 px tall
    Start button: 36 px tall (a) Back (b) Start (c) Next
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
36. 36.True or false: grey text on grey is good button design. (a) False (b) True
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Back button: 68 px tall
    Cancel button: 28 px tall
    Done button: 72 px tall (a) Back (b) Done (c) Cancel (d) Save
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Save button: 48 px tall
    Next button: 56 px tall
    Send button: 60 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Send button: 24 px tall
    Cancel button: 72 px tall
    Next button: 52 px tall (a) Send (b) Next (c) Save (d) Cancel
40. 40.True or false: icons with no meaning is good button design. (a) False (b) True

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