App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 289 · 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.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) light grey on white
2. 2.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.True or false: a big, easy tap area is good button design. (a) False (b) True
4. 4.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.True or false: a big, easy tap area is poor button design. (a) False (b) True
6. 6.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
7. 7.True or false: a tiny 20 px button is poor button design. (a) True (b) False
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 36 px tall
   Send button: 48 px tall
   Done button: 72 px tall
   Save button: 72 px tall (a) Send (b) Start (c) Save (d) Done
9. 9.True or false: grey text on grey is poor button design. (a) False (b) True
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
11. 11.True or false: space between buttons is good button design. (a) True (b) False
12. 12.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on black (c) white on dark green (d) dark blue on white
13. 13.True or false: a clear word like Save is poor button design. (a) True (b) False
14. 14.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 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?
    Save button: 40 px tall
    Help button: 48 px tall
    Cancel button: 56 px tall
    Done button: 64 px tall (a) Cancel (b) Help (c) Done (d) Save
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Cancel button: 56 px tall
    Send button: 60 px tall (a) Cancel (b) Send (c) Start
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Start button: 64 px tall
    Cancel button: 44 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Next button: 60 px tall
    Back button: 60 px tall
20. 20.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Cancel button: 60 px tall
    Done button: 64 px tall
22. 22.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) light grey on white (d) dark blue on white
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Cancel button: 48 px tall
    Done button: 32 px tall
    Next button: 56 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Next button: 60 px tall
    Back button: 52 px tall
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Start button: 60 px tall
    Save button: 60 px tall
    Send button: 40 px tall (a) Save (b) Cancel (c) Start (d) Send
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Send button: 24 px tall
    Help button: 56 px tall (a) Help (b) Send (c) Cancel
28. 28.True or false: buttons almost touching is poor button design. (a) False (b) True
29. 29.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Help button: 48 px tall
    Cancel button: 32 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Cancel button: 72 px tall
    Send button: 36 px tall
    Save button: 64 px tall (a) Back (b) Send (c) Cancel (d) Save
35. 35.True or false: buttons almost touching is good button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Start button: 44 px tall
    Done button: 60 px tall
37. 37.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) yellow on white (d) black on pale grey
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Next button: 72 px tall
    Save button: 56 px tall
    Cancel button: 60 px tall (a) Next (b) Save (c) Help (d) Cancel
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Save button: 52 px tall
    Start button: 60 px tall
40. 40.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read

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