App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 340 · 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: icons with no meaning is poor button design. (a) True (b) False
2. 2.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) light grey on white (d) pale pink on white
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 52 px tall
   Start button: 44 px tall
   Help button: 56 px tall
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?
   Help button: 48 px tall
   Next button: 52 px tall
   Save button: 40 px tall (a) Next (b) Save (c) Help
6. 6.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on black (c) dark blue on white (d) white on dark green
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 24 px tall
   Save button: 52 px tall
   Cancel button: 60 px tall
   Send button: 48 px tall (a) Start (b) Save (c) Cancel (d) Send
8. 8.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 68 px tall
   Done button: 24 px tall
   Start button: 56 px tall (a) Help (b) Start (c) Done
10. 10.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Save button: 28 px tall
    Help button: 48 px tall (a) Save (b) Help (c) Back
12. 12.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Save button: 48 px tall
    Help button: 40 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Back button: 72 px tall
    Start button: 36 px tall (a) Start (b) Done (c) Back
15. 15.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.True or false: grey text on grey is poor button design. (a) False (b) True
19. 19.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) white on dark green (d) light grey on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Cancel button: 64 px tall
    Done button: 56 px tall (a) Save (b) Done (c) Cancel
21. 21.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) dark blue on black (d) white on dark green
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Save button: 56 px tall
    Send button: 56 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Save button: 40 px tall
    Start button: 52 px tall (a) Start (b) Save (c) Next
25. 25.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) yellow on white (d) dark blue on black
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 40 px tall
    Send button: 68 px tall
    Next button: 64 px tall (a) Next (b) Send (c) Help
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Start button: 48 px tall
    Back button: 48 px tall
    Help button: 68 px tall (a) Cancel (b) Back (c) Help (d) Start
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
29. 29.True or false: a big, easy tap area is poor button design. (a) True (b) False
30. 30.True or false: a clear word like Save is good button design. (a) False (b) True
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Help button: 68 px tall
    Send button: 40 px tall (a) Help (b) Cancel (c) Send
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Next button: 36 px tall
    Send button: 32 px tall
    Back button: 32 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Help button: 56 px tall
    Next button: 44 px tall
    Back button: 68 px tall (a) Next (b) Cancel (c) Help (d) Back
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
36. 36.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) pale pink on white (d) white on dark green
37. 37.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
38. 38.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Next button: 36 px tall
    Help button: 72 px tall (a) Send (b) Help (c) Next
40. 40.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read

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