App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 138 · 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.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 64 px tall
   Save button: 52 px tall
   Back button: 44 px tall
   Next button: 52 px tall
2. 2.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
3. 3.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.Which colour pair is easy to read? (a) dark blue on black (b) black on pale grey (c) yellow on white (d) light grey on white
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 60 px tall
   Done button: 68 px tall
   Next button: 40 px tall (a) Done (b) Next (c) Save
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 40 px tall
   Start button: 48 px tall
   Cancel button: 48 px tall (a) Done (b) Cancel (c) Start
8. 8.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) white on black (d) red on green
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
10. 10.True or false: a big, easy tap area is poor button design. (a) True (b) False
11. 11.True or false: a clear word like Save is poor button design. (a) True (b) False
12. 12.True or false: icons with no meaning is good button design. (a) False (b) True
13. 13.True or false: strong colour contrast is poor button design. (a) True (b) False
14. 14.🌗 Is light grey on white 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. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Done button: 60 px tall
    Start button: 60 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Send button: 44 px tall
    Help button: 60 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Done button: 40 px tall
    Send button: 32 px tall
    Next button: 60 px tall
19. 19.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Next button: 28 px tall
    Save button: 72 px tall
    Send button: 52 px tall (a) Start (b) Send (c) Next (d) Save
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Cancel button: 36 px tall
    Help button: 64 px tall
    Done button: 40 px tall
22. 22.True or false: space between buttons is poor button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Cancel button: 40 px tall
    Start button: 60 px tall
    Back button: 64 px tall
24. 24.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
27. 27.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
30. 30.True or false: buttons almost touching is good button design. (a) True (b) False
31. 31.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
32. 32.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
33. 33.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
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.True or false: grey text on grey is good button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 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?
    Save button: 60 px tall
    Help button: 28 px tall
    Cancel button: 48 px tall
    Send button: 56 px tall (a) Send (b) Help (c) Save (d) Cancel
38. 38.Which colour pair is easy to read? (a) white on black (b) dark blue on black (c) pale pink on white (d) red on green
39. 39.True or false: a tiny 20 px button is good button design. (a) False (b) True
40. 40.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) light grey on white (d) white on black

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