App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 563 · 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: 72 px tall
   Cancel button: 68 px tall
   Send button: 52 px tall
   Done button: 36 px tall (a) Done (b) Send (c) Save (d) Cancel
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 36 px tall
   Send button: 64 px tall
   Cancel button: 48 px tall (a) Cancel (b) Send (c) Help
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 36 px tall
   Help button: 56 px tall
   Next button: 56 px tall (a) Help (b) Start (c) Next
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
5. 5.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
6. 6.🌗 Is white on dark green 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. How many of these buttons follow the rule?
   Save button: 36 px tall
   Next button: 56 px tall
   Help button: 60 px tall
8. 8.True or false: space between buttons is poor button design. (a) True (b) False
9. 9.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
10. 10.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🌗 Is yellow on white 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. Which button is too small?
    Start button: 24 px tall
    Back button: 52 px tall
    Save button: 48 px tall (a) Back (b) Start (c) Save
14. 14.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Done button: 40 px tall
    Cancel button: 64 px tall (a) Cancel (b) Done (c) Next
16. 16.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
17. 17.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
18. 18.True or false: a tiny 20 px button is good button design. (a) True (b) False
19. 19.True or false: buttons almost touching is good button design. (a) True (b) False
20. 20.Which colour pair is hard to read? (a) yellow on white (b) white on black (c) white on dark green (d) dark blue on white
21. 21.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) red on green (d) dark blue on black
23. 23.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) dark blue on black (d) yellow on white
25. 25.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) black on yellow (d) red on green
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 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?
    Next button: 32 px tall
    Back button: 44 px tall
    Send button: 48 px tall
28. 28.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Next button: 56 px tall
    Start button: 44 px tall
    Send button: 36 px tall
30. 30.True or false: a clear word like Save is good button design. (a) True (b) False
31. 31.True or false: strong colour contrast is good button design. (a) False (b) True
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Start button: 48 px tall
    Done button: 68 px tall
    Save button: 32 px tall (a) Cancel (b) Start (c) Done (d) Save
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Send button: 48 px tall
    Start button: 68 px tall (a) Send (b) Start (c) Next
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Save button: 56 px tall
    Cancel button: 36 px tall (a) Done (b) Cancel (c) Save
35. 35.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) light grey on white (d) white on dark green
36. 36.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 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?
    Cancel button: 36 px tall
    Next button: 56 px tall
    Help button: 40 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Save button: 44 px tall
    Next button: 60 px tall
    Back button: 64 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Start button: 60 px tall
    Next button: 40 px tall

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