App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 616 · 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.True or false: a tiny 20 px button is good button design. (a) True (b) False
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.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) pale pink on white (d) red on green
5. 5.True or false: a big, easy tap area is poor button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 32 px tall
   Save button: 40 px tall
   Help button: 48 px tall
   Next button: 56 px tall
7. 7.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
8. 8.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 48 px tall
   Next button: 32 px tall
   Help button: 48 px tall (a) Next (b) Help (c) Start
10. 10.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
11. 11.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
12. 12.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Help button: 64 px tall
    Send button: 32 px tall
14. 14.True or false: grey text on grey is good button design. (a) True (b) False
15. 15.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Next button: 44 px tall
    Start button: 64 px tall (a) Start (b) Done (c) Next
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Cancel button: 60 px tall
    Save button: 28 px tall (a) Save (b) Next (c) Cancel
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Send button: 36 px tall
    Done button: 52 px tall
    Cancel button: 32 px tall
19. 19.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.True or false: buttons almost touching is good button design. (a) False (b) True
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
22. 22.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) light grey on white (d) white on black
23. 23.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
25. 25.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Cancel button: 44 px tall
    Help button: 36 px tall
28. 28.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) light grey on white (d) pale pink on white
30. 30.Which colour pair is hard to read? (a) black on yellow (b) yellow on white (c) black on pale grey (d) dark blue on white
31. 31.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Done button: 68 px tall
    Help button: 48 px tall
    Next button: 48 px tall (a) Help (b) Cancel (c) Done (d) Next
33. 33.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) pale pink on white (d) light grey on white
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Send button: 64 px tall
    Next button: 36 px tall (a) Send (b) Next (c) Done
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Back button: 60 px tall
    Save button: 64 px tall (a) Save (b) Back (c) Done
36. 36.True or false: icons with no meaning is poor button design. (a) False (b) True
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Help button: 48 px tall
    Save button: 56 px tall
    Start button: 48 px tall (a) Help (b) Start (c) Next (d) Save
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Help button: 48 px tall
    Send button: 52 px tall (a) Help (b) Send (c) Back
39. 39.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
40. 40.True or false: a tiny 20 px button is poor button design. (a) False (b) True

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