App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 131 · 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 red on green 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. The Help 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) good design (b) poor design
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 52 px tall
   Save button: 44 px tall
   Next button: 72 px tall (a) Start (b) Next (c) Save
5. 5.True or false: a tiny 20 px button is poor button design. (a) True (b) False
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.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) red on green (d) dark blue on black
8. 8.🌗 Is white on black 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. The Save button is 20 px tall. How many px taller must it be?
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Save button: 24 px tall
    Back button: 52 px tall (a) Next (b) Save (c) Back
11. 11.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) yellow on white (d) dark blue on white
12. 12.True or false: buttons almost touching is good button design. (a) True (b) False
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
14. 14.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) white on black (d) light grey on white
15. 15.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Send button: 40 px tall
    Back button: 60 px tall
    Save button: 56 px tall
17. 17.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.True or false: a big, easy tap area is poor button design. (a) True (b) False
19. 19.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Send button: 32 px tall
    Start button: 32 px tall
    Back button: 40 px tall
21. 21.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Start button: 40 px tall
    Done button: 56 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Send button: 56 px tall
    Start button: 64 px tall
24. 24.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
25. 25.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
29. 29.True or false: a clear word like Save is poor button design. (a) False (b) True
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Next button: 68 px tall
    Done button: 56 px tall (a) Done (b) Save (c) Next
31. 31.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Start button: 48 px tall
    Back button: 52 px tall
    Cancel button: 40 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Save button: 68 px tall
    Done button: 48 px tall
    Cancel button: 28 px tall (a) Cancel (b) Done (c) Back (d) Save
34. 34.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) dark blue on white (d) pale pink on white
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Help button: 60 px tall
    Next button: 48 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Next button: 48 px tall
    Send button: 32 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Save button: 56 px tall
    Start button: 40 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 40 px tall
    Save button: 52 px tall
    Next button: 72 px tall (a) Next (b) Save (c) Help
39. 39.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) dark blue on white (d) red on green
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Next button: 52 px tall
    Back button: 64 px tall
    Help button: 44 px tall

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