App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 98 · 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. Which button is too small?
   Save button: 52 px tall
   Next button: 64 px tall
   Start button: 24 px tall
   Help button: 52 px tall (a) Start (b) Help (c) Save (d) Next
2. 2.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
3. 3.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.True or false: grey text on grey is good button design. (a) False (b) True
5. 5.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
8. 8.True or false: space between buttons is poor button design. (a) True (b) False
9. 9.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
11. 11.🌗 Is white on dark green 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. How many of these buttons follow the rule?
    Help button: 36 px tall
    Save button: 52 px tall
    Back button: 60 px tall
13. 13.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) black on yellow (d) yellow on white
14. 14.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) dark blue on black (d) black on pale grey
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Back button: 32 px tall
    Done button: 72 px tall
    Start button: 60 px tall (a) Cancel (b) Start (c) Back (d) Done
16. 16.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) red on green (d) white on black
17. 17.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Help button: 68 px tall
    Next button: 24 px tall (a) Save (b) Help (c) Next
19. 19.True or false: a big, easy tap area is poor button design. (a) False (b) True
20. 20.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) pale pink on white (d) light grey on white
21. 21.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
22. 22.True or false: buttons almost touching is poor button design. (a) True (b) False
23. 23.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Save button: 68 px tall
    Back button: 72 px tall
    Help button: 48 px tall (a) Help (b) Save (c) Back (d) Cancel
25. 25.True or false: icons with no meaning is good button design. (a) True (b) False
26. 26.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
27. 27.True or false: icons with no meaning is poor button design. (a) False (b) True
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
29. 29.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) yellow on white (d) black on pale grey
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Next 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?
    Help button: 64 px tall
    Next button: 60 px tall
    Send button: 60 px tall
    Done button: 64 px tall
32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Next button: 32 px tall
    Send button: 60 px tall
    Back button: 32 px tall
34. 34.True or false: a big, easy tap area is good button design. (a) False (b) True
35. 35.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.Which colour pair is hard to read? (a) white on dark green (b) light grey on white (c) white on black (d) dark blue on white
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Next button: 44 px tall
    Start button: 36 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Save button: 56 px tall
    Next button: 60 px tall
40. 40.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read

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