App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 82 · 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 Send button is 32 px tall. How many px taller must it be?
2. 2.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
3. 3.True or false: space between buttons is poor button design. (a) False (b) True
4. 4.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
6. 6.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.True or false: icons with no meaning is poor button design. (a) False (b) True
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 56 px tall
   Save button: 60 px tall
   Start button: 40 px tall
9. 9.True or false: a big, easy tap area is poor button design. (a) False (b) True
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
11. 11.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
12. 12.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Done button: 52 px tall
    Save button: 56 px tall (a) Save (b) Cancel (c) Done
14. 14.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) black on pale grey (d) light grey on white
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
16. 16.True or false: buttons almost touching is poor button design. (a) True (b) False
17. 17.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) black on pale grey (d) light grey on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 32 px tall
    Cancel button: 68 px tall
    Send button: 68 px tall
    Save button: 60 px tall (a) Cancel (b) Send (c) Save (d) Start
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Send button: 32 px tall
    Save button: 52 px tall (a) Done (b) Send (c) Save
20. 20.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.True or false: strong colour contrast is poor button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Cancel button: 48 px tall
    Next button: 60 px tall (a) Next (b) Done (c) Cancel
23. 23.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) black on yellow (d) dark blue on white
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Back button: 68 px tall
    Cancel button: 32 px tall (a) Cancel (b) Help (c) Back
25. 25.True or false: a clear word like Save is good button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Save button: 44 px tall
    Send button: 64 px tall
28. 28.True or false: a clear word like Save is poor button design. (a) True (b) False
29. 29.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) dark blue on white (d) red on green
30. 30.True or false: a tiny 20 px button is poor button design. (a) False (b) True
31. 31.True or false: grey text on grey is good button design. (a) False (b) True
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Next button: 32 px tall
    Help button: 44 px tall
33. 33.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) yellow on white
34. 34.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Next button: 60 px tall
    Send button: 24 px tall (a) Next (b) Send (c) Start
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Start button: 64 px tall
    Back button: 36 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Next button: 44 px tall
    Cancel button: 60 px tall
38. 38.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Cancel button: 48 px tall
    Done button: 52 px tall (a) Done (b) Cancel (c) Start
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Back button: 60 px tall
    Save button: 36 px tall (a) Next (b) Back (c) Save

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