App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 434 · 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 pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 32 px tall
   Next button: 48 px tall
   Help button: 52 px tall (a) Done (b) Next (c) Help
3. 3.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
5. 5.Which colour pair is easy to read? (a) red on green (b) white on black (c) pale pink on white (d) dark blue on black
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 52 px tall
   Next button: 36 px tall
   Back button: 48 px tall
   Help button: 32 px tall
8. 8.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.Which colour pair is easy to read? (a) pale pink on white (b) black on pale grey (c) light grey on white (d) red on green
12. 12.🔘 Is this good or poor button design: a clear word like Save? (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: 48 px tall
    Send button: 40 px tall
    Done button: 64 px tall
14. 14.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
15. 15.True or false: a tiny 20 px button is poor button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Back button: 40 px tall
    Start button: 64 px tall (a) Done (b) Start (c) Back
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Save button: 32 px tall
    Done button: 60 px tall
    Cancel button: 52 px tall
19. 19.True or false: grey text on grey is good button design. (a) False (b) True
20. 20.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Save button: 72 px tall
    Back button: 72 px tall (a) Save (b) Back (c) Done
22. 22.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.True or false: space between buttons is poor button design. (a) False (b) True
24. 24.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) black on yellow (d) white on dark green
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Back button: 40 px tall
    Start button: 36 px tall
26. 26.True or false: a tiny 20 px button is good button design. (a) False (b) True
27. 27.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) black on yellow (d) yellow on white
28. 28.True or false: grey text on grey is poor button design. (a) True (b) False
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Done button: 32 px tall
    Cancel button: 48 px tall
    Next button: 36 px tall
30. 30.True or false: a clear word like Save is poor button design. (a) True (b) False
31. 31.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Help button: 60 px tall
    Done button: 52 px tall (a) Done (b) Help (c) Send
33. 33.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.True or false: strong colour contrast is poor button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Cancel button: 32 px tall
    Next button: 52 px tall
    Back button: 72 px tall (a) Back (b) Next (c) Save (d) Cancel
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Save button: 28 px tall
    Done button: 48 px tall (a) Help (b) Done (c) Save
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Back button: 64 px tall
    Send button: 64 px tall (a) Send (b) Back (c) Next
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Cancel button: 36 px tall
    Send button: 36 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Next button: 36 px tall
    Help button: 64 px tall
    Back button: 56 px tall

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