App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 103 · 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 dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 48 px tall
   Next button: 28 px tall
   Done button: 48 px tall (a) Save (b) Next (c) Done
5. 5.True or false: a big, easy tap area is good button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 44 px tall
   Send button: 72 px tall
   Cancel button: 56 px tall (a) Save (b) Send (c) Cancel
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 64 px tall
   Save button: 48 px tall
   Start button: 40 px tall
   Help button: 32 px tall
8. 8.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 72 px tall
   Done button: 24 px tall
   Back button: 64 px tall (a) Save (b) Back (c) Done
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Send button: 32 px tall
    Next button: 68 px tall (a) Next (b) Cancel (c) Send
11. 11.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) pale pink on white (d) white on dark green
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
13. 13.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
15. 15.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) light grey on white (d) black on pale grey
16. 16.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on white (c) yellow on white (d) red on green
17. 17.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Save button: 36 px tall
    Next button: 56 px tall (a) Back (b) Next (c) Save
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Done button: 32 px tall
    Next button: 56 px tall
    Help button: 32 px tall
20. 20.Which colour pair is easy to read? (a) dark blue on black (b) black on yellow (c) pale pink on white (d) light grey on white
21. 21.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) red on green (d) white on black
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Cancel button: 56 px tall
    Next button: 24 px tall (a) Cancel (b) Help (c) Next
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Save button: 52 px tall
    Start button: 24 px tall (a) Save (b) Start (c) Help
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Back button: 48 px tall
    Start button: 28 px tall
    Next button: 56 px tall (a) Back (b) Next (c) Start (d) Cancel
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Save button: 64 px tall
    Back button: 64 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Done button: 48 px tall
    Save button: 72 px tall (a) Done (b) Save (c) Help
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Start button: 40 px tall
    Done button: 44 px tall
28. 28.Which colour pair is hard to read? (a) black on yellow (b) yellow on white (c) white on black (d) dark blue on white
29. 29.True or false: a clear word like Save is poor button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Save button: 48 px tall
    Back button: 44 px tall
31. 31.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.True or false: a big, easy tap area is poor button design. (a) False (b) True
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Send button: 52 px tall
    Next button: 68 px tall (a) Help (b) Send (c) Next
35. 35.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
36. 36.True or false: strong colour contrast is poor button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Help button: 32 px tall
    Done button: 60 px tall
38. 38.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
39. 39.True or false: a clear word like Save is good button design. (a) False (b) True
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?

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