App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 162 · 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 black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.True or false: buttons almost touching is good button design. (a) False (b) True
3. 3.True or false: strong colour contrast is poor button design. (a) True (b) False
4. 4.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) black on yellow (d) light grey on white
5. 5.True or false: a clear word like Save is poor button design. (a) True (b) False
6. 6.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) pale pink on white (d) dark blue on white
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 64 px tall
   Done button: 36 px tall
   Help button: 64 px tall
   Back button: 60 px tall
8. 8.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
9. 9.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) red on green (d) black on yellow
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Cancel button: 64 px tall
    Start button: 72 px tall
    Send button: 64 px tall (a) Start (b) Cancel (c) Send (d) Save
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Cancel button: 64 px tall
    Next button: 32 px tall (a) Save (b) Cancel (c) Next
12. 12.True or false: space between buttons is poor button design. (a) True (b) False
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Save button: 44 px tall
    Back button: 32 px tall
    Next button: 56 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Start button: 64 px tall
    Help button: 24 px tall (a) Start (b) Help (c) Save
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Save button: 64 px tall
    Send button: 60 px tall
    Back button: 72 px tall (a) Back (b) Save (c) Cancel (d) Send
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Cancel button: 48 px tall
    Send button: 52 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Back button: 60 px tall
    Send button: 40 px tall
20. 20.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
23. 23.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
24. 24.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) pale pink on white (d) white on dark green
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Send button: 40 px tall
    Start button: 40 px tall
26. 26.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Cancel button: 64 px tall
    Next button: 36 px tall
    Back button: 44 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Start button: 52 px tall
    Next button: 36 px tall (a) Next (b) Cancel (c) Start
29. 29.Which colour pair is hard to read? (a) black on yellow (b) light grey on white (c) white on black (d) dark blue on white
30. 30.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Send button: 48 px tall
    Back button: 64 px tall
    Save button: 40 px tall
34. 34.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.True or false: space between buttons is good button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Cancel button: 64 px tall
    Start button: 48 px tall
    Next button: 24 px tall (a) Next (b) Cancel (c) Start (d) Send
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Next button: 56 px tall
    Back button: 56 px tall

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