App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 142 · 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.True or false: a clear word like Save is poor button design. (a) True (b) False
2. 2.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.Which colour pair is easy to read? (a) pale pink on white (b) black on pale grey (c) dark blue on black (d) yellow on white
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 56 px tall
   Send button: 44 px tall
   Start button: 48 px tall
   Help button: 40 px tall
5. 5.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
6. 6.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 44 px tall
   Next button: 72 px tall
   Start button: 68 px tall (a) Send (b) Start (c) Next
9. 9.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Save button: 64 px tall
    Cancel button: 44 px tall
    Next button: 72 px tall (a) Next (b) Save (c) Cancel (d) Back
11. 11.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) light grey on white (d) black on yellow
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Save button: 40 px tall
    Start button: 36 px tall
13. 13.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Help button: 40 px tall
    Next button: 52 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Done button: 60 px tall
    Cancel button: 36 px tall
16. 16.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Done button: 44 px tall
    Save button: 36 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Send button: 64 px tall
    Save button: 56 px tall
    Start button: 68 px tall (a) Start (b) Send (c) Back (d) Save
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Cancel button: 56 px tall
    Back button: 52 px tall
    Next button: 32 px tall
20. 20.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
21. 21.True or false: strong colour contrast is good button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
23. 23.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) white on dark green (d) dark blue on black
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Back button: 60 px tall
    Cancel button: 48 px tall (a) Next (b) Cancel (c) Back
26. 26.True or false: a tiny 20 px button is poor button design. (a) False (b) True
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
28. 28.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on yellow (d) red on green
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Help button: 56 px tall
    Cancel button: 36 px tall
30. 30.True or false: icons with no meaning is poor button design. (a) False (b) True
31. 31.True or false: buttons almost touching is poor button design. (a) False (b) True
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Done button: 36 px tall
    Cancel button: 64 px tall (a) Cancel (b) Send (c) Done
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
35. 35.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Help button: 44 px tall
    Send button: 64 px tall (a) Help (b) Send (c) Start
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 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?
    Save button: 48 px tall
    Send button: 52 px tall
    Back button: 48 px tall
    Start button: 24 px tall (a) Start (b) Save (c) Send (d) Back
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?

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