App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 236 · 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 good button design. (a) True (b) False
2. 2.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
3. 3.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 60 px tall
   Next button: 68 px tall
   Start button: 52 px tall
   Help button: 40 px tall (a) Start (b) Next (c) Help (d) Cancel
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 68 px tall
   Cancel button: 36 px tall
   Back button: 64 px tall (a) Help (b) Back (c) Cancel
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
8. 8.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) light grey on white (d) white on dark green
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 52 px tall
   Next button: 40 px tall
   Start button: 68 px tall (a) Help (b) Next (c) Start
10. 10.True or false: a tiny 20 px button is good button design. (a) True (b) False
11. 11.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) black on yellow (d) dark blue on black
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Cancel button: 60 px tall
    Start button: 24 px tall (a) Send (b) Start (c) Cancel
13. 13.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) light grey on white (d) black on pale grey
14. 14.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
15. 15.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
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. Which button is too small?
    Help button: 52 px tall
    Back button: 72 px tall
    Next button: 44 px tall (a) Back (b) Help (c) Next
18. 18.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.True or false: buttons almost touching is poor button design. (a) True (b) False
20. 20.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) red on green (d) white on black
21. 21.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on white (d) dark blue on black
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Next button: 28 px tall
    Save button: 48 px tall
    Cancel button: 72 px tall (a) Next (b) Cancel (c) Back (d) Save
23. 23.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) red on green (d) light grey on white
24. 24.True or false: a clear word like Save is poor button design. (a) True (b) False
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Done button: 52 px tall
    Help button: 48 px tall
    Back button: 56 px tall
26. 26.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Next button: 56 px tall
    Start button: 56 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Back button: 56 px tall
    Save button: 32 px tall (a) Save (b) Next (c) Back
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Send button: 40 px tall
    Next button: 32 px tall
    Back button: 44 px tall
30. 30.True or false: buttons almost touching is good button design. (a) False (b) True
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Back button: 48 px tall
    Send button: 40 px tall (a) Next (b) Back (c) Send
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Back button: 68 px tall
    Done button: 52 px tall (a) Done (b) Back (c) Send
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Cancel button: 44 px tall
    Done button: 44 px tall
34. 34.True or false: strong colour contrast is good button design. (a) False (b) True
35. 35.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
36. 36.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
37. 37.True or false: grey text on grey is poor button design. (a) False (b) True
38. 38.True or false: space between buttons is good button design. (a) False (b) True
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Save button: 64 px tall
    Back button: 64 px tall (a) Save (b) Back (c) Cancel
40. 40.True or false: strong colour contrast is poor button design. (a) False (b) True

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