App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 357 · 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. How many of these buttons follow the rule?
   Send button: 64 px tall
   Cancel button: 60 px tall
   Save button: 32 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 52 px tall
   Start button: 56 px tall
   Next button: 44 px tall (a) Next (b) Start (c) Back
3. 3.True or false: grey text on grey is poor button design. (a) True (b) False
4. 4.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.True or false: buttons almost touching is poor button design. (a) True (b) False
6. 6.True or false: a big, easy tap area is poor button design. (a) False (b) True
7. 7.Which colour pair is easy to read? (a) black on pale grey (b) red on green (c) pale pink on white (d) dark blue on black
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 36 px tall
   Send button: 60 px tall
   Back button: 56 px tall (a) Back (b) Start (c) Send
9. 9.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
10. 10.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
12. 12.True or false: buttons almost touching is good button design. (a) True (b) False
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Next button: 36 px tall
    Save button: 44 px tall
    Cancel button: 32 px tall
14. 14.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
17. 17.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Back button: 40 px tall
    Cancel button: 48 px tall
    Done button: 32 px tall
19. 19.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Start button: 72 px tall
    Back button: 72 px tall (a) Start (b) Help (c) Back
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Save button: 60 px tall
    Done button: 48 px tall
    Help button: 48 px tall
22. 22.True or false: strong colour contrast is good button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Start button: 68 px tall
    Back button: 60 px tall
    Cancel button: 44 px tall (a) Help (b) Start (c) Back (d) Cancel
24. 24.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
25. 25.🌗 Is pale pink on white 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. How many of these buttons follow the rule?
    Done button: 44 px tall
    Save button: 52 px tall
    Next button: 48 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
28. 28.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Save button: 72 px tall
    Back button: 72 px tall
    Done button: 36 px tall (a) Done (b) Back (c) Next (d) Save
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
31. 31.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on black (d) red on green
32. 32.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Save button: 24 px tall
    Cancel button: 48 px tall
    Next button: 60 px tall (a) Next (b) Cancel (c) Save (d) Start
35. 35.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Done button: 48 px tall
    Save button: 44 px tall
37. 37.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Help button: 52 px tall
    Next button: 32 px tall
39. 39.True or false: strong colour contrast is poor button design. (a) False (b) True
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Cancel button: 40 px tall
    Save button: 36 px tall
    Send button: 48 px tall

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