App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 471 · 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 this good or poor button design: strong colour contrast? (a) good design (b) poor design
2. 2.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) dark blue on black (d) black on yellow
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 32 px tall
   Save button: 40 px tall
   Next button: 48 px tall
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
5. 5.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) red on green (d) dark blue on white
6. 6.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 68 px tall
   Help button: 60 px tall
   Next button: 28 px tall (a) Next (b) Save (c) Help
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 56 px tall
   Start button: 48 px tall
   Help button: 28 px tall (a) Start (b) Help (c) Save
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 68 px tall
   Send button: 24 px tall
   Back button: 68 px tall (a) Cancel (b) Back (c) Send
10. 10.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
11. 11.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.True or false: strong colour contrast is poor button design. (a) False (b) True
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
15. 15.True or false: a big, easy tap area is good button design. (a) True (b) False
16. 16.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) yellow on white (d) dark blue on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Back button: 36 px tall
    Cancel button: 60 px tall
19. 19.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Done button: 28 px tall
    Start button: 60 px tall
    Back button: 56 px tall (a) Done (b) Back (c) Send (d) Start
21. 21.True or false: icons with no meaning is poor button design. (a) False (b) True
22. 22.True or false: a clear word like Save is poor button design. (a) False (b) True
23. 23.True or false: icons with no meaning is good button design. (a) True (b) False
24. 24.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
25. 25.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) pale pink on white (d) yellow on white
26. 26.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Save button: 40 px tall
    Back button: 52 px tall
    Next button: 60 px tall (a) Save (b) Back (c) Help (d) Next
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
32. 32.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Back button: 72 px tall
    Cancel button: 72 px tall (a) Cancel (b) Back (c) Done
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Back button: 40 px tall
    Help button: 36 px tall
    Cancel button: 64 px tall
36. 36.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
38. 38.True or false: a clear word like Save is good button design. (a) False (b) True
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?

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