App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 193 · 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?
   Send button: 52 px tall
   Cancel button: 44 px tall
   Next button: 48 px tall (a) Send (b) Cancel (c) Next
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 52 px tall
   Cancel button: 60 px tall
   Help button: 40 px tall
   Save button: 72 px tall (a) Cancel (b) Help (c) Save (d) Next
3. 3.True or false: buttons almost touching is poor button design. (a) False (b) True
4. 4.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) dark blue on white (d) dark blue on black
5. 5.True or false: a clear word like Save is poor button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 72 px tall
   Send button: 36 px tall
   Back button: 68 px tall (a) Back (b) Send (c) Cancel
7. 7.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 72 px tall
   Save button: 40 px tall
   Send button: 48 px tall
   Done button: 72 px tall (a) Done (b) Save (c) Back (d) Send
9. 9.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) white on black (d) light grey on white
10. 10.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) yellow on white (d) black on pale grey
11. 11.Which colour pair is hard to read? (a) black on pale grey (b) red on green (c) black on yellow (d) white on dark green
12. 12.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Send button: 56 px tall
    Next button: 44 px tall (a) Help (b) Send (c) Next
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Start button: 48 px tall
    Cancel button: 44 px tall
    Send button: 60 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Start button: 52 px tall
    Next button: 52 px tall
    Help button: 60 px tall (a) Start (b) Done (c) Help (d) Next
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Send button: 40 px tall
    Done button: 64 px tall
    Save button: 32 px tall
18. 18.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
20. 20.Which colour pair is easy to read? (a) white on dark green (b) light grey on white (c) yellow on white (d) red on green
21. 21.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Done button: 64 px tall
    Help button: 36 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Start button: 24 px tall
    Back button: 48 px tall (a) Send (b) Start (c) Back
24. 24.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
25. 25.🌗 Is dark blue 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 Save button is 24 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
28. 28.True or false: buttons almost touching is good button design. (a) False (b) True
29. 29.True or false: a tiny 20 px button is poor button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Next button: 68 px tall
    Send button: 56 px tall
    Done button: 52 px tall (a) Next (b) Done (c) Send (d) Start
31. 31.True or false: space between buttons is good button design. (a) True (b) False
32. 32.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
34. 34.True or false: a big, easy tap area is good button design. (a) False (b) True
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Help button: 60 px tall
    Save button: 52 px tall (a) Save (b) Help (c) Start
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Next button: 40 px tall
    Start button: 68 px tall
    Done button: 60 px tall (a) Start (b) Back (c) Next (d) Done
37. 37.True or false: icons with no meaning is good button design. (a) True (b) False
38. 38.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.True or false: a clear word like Save is good button design. (a) True (b) False
40. 40.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) pale pink on white (d) black on yellow

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