App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 462 · 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 white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) black on yellow (d) yellow on white
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
4. 4.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
5. 5.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) red on green (d) white on dark green
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 64 px tall
   Send button: 48 px tall
   Start button: 52 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 48 px tall
   Next button: 64 px tall
   Help button: 36 px tall
   Cancel button: 52 px tall (a) Send (b) Cancel (c) Help (d) Next
8. 8.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
10. 10.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
11. 11.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Cancel button: 64 px tall
    Save button: 44 px tall
    Next button: 48 px tall (a) Save (b) Back (c) Next (d) Cancel
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Start button: 40 px tall
    Cancel button: 32 px tall
14. 14.True or false: buttons almost touching is good button design. (a) True (b) False
15. 15.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) yellow on white (d) dark blue on white
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Start button: 24 px tall
    Back button: 60 px tall
    Next button: 68 px tall (a) Back (b) Help (c) Next (d) Start
17. 17.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on dark green (d) light grey on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Next button: 40 px tall
    Start button: 72 px tall (a) Send (b) Start (c) Next
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Done button: 56 px tall
    Cancel button: 36 px tall
    Start button: 44 px tall
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Back button: 52 px tall
    Next button: 56 px tall
21. 21.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
24. 24.True or false: a clear word like Save is good button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Send button: 56 px tall
    Done button: 64 px tall
    Save button: 24 px tall (a) Next (b) Done (c) Send (d) Save
26. 26.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
28. 28.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
29. 29.True or false: buttons almost touching is poor button design. (a) False (b) True
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Done button: 64 px tall
    Send button: 56 px tall
    Cancel button: 52 px tall (a) Send (b) Done (c) Cancel (d) Next
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Done button: 64 px tall
    Cancel button: 68 px tall
    Send button: 60 px tall (a) Back (b) Send (c) Cancel (d) Done
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Cancel button: 68 px tall
    Done button: 40 px tall (a) Cancel (b) Done (c) Help
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Save button: 48 px tall
    Send button: 72 px tall
    Back button: 52 px tall (a) Save (b) Start (c) Send (d) Back
35. 35.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) light grey on white (d) black on pale grey
36. 36.True or false: a tiny 20 px button is good button design. (a) True (b) False
37. 37.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Next button: 28 px tall
    Start button: 72 px tall (a) Help (b) Start (c) Next
40. 40.True or false: a big, easy tap area is good button design. (a) False (b) True

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