App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 194 · 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?
   Back button: 48 px tall
   Save button: 52 px tall
   Cancel button: 44 px tall (a) Back (b) Cancel (c) Save
2. 2.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
4. 4.True or false: icons with no meaning is good button design. (a) True (b) False
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 28 px tall
   Back button: 56 px tall
   Start button: 64 px tall (a) Start (b) Send (c) Back
6. 6.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.True or false: a tiny 20 px button is poor button design. (a) False (b) True
9. 9.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) white on dark green (d) yellow on white
10. 10.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
11. 11.True or false: buttons almost touching is good button design. (a) True (b) False
12. 12.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.True or false: strong colour contrast is good button design. (a) False (b) True
14. 14.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) white on dark green (d) pale pink on white
15. 15.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) light grey on white (d) black on pale grey
16. 16.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
17. 17.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.Which colour pair is easy to read? (a) black on pale grey (b) red on green (c) light grey on white (d) pale pink on white
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Cancel button: 28 px tall
    Next button: 68 px tall
    Done button: 68 px tall (a) Cancel (b) Help (c) Done (d) Next
21. 21.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
24. 24.True or false: a big, easy tap area is poor button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Help button: 40 px tall
    Back button: 32 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Help button: 48 px tall
    Cancel button: 40 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Send button: 72 px tall
    Back button: 68 px tall
    Done button: 56 px tall (a) Send (b) Back (c) Save (d) Done
29. 29.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Done button: 32 px tall
    Send button: 64 px tall
    Start button: 44 px tall
32. 32.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Done button: 48 px tall
    Save button: 28 px tall
    Start button: 52 px tall (a) Save (b) Send (c) Done (d) Start
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Cancel button: 24 px tall
    Send button: 68 px tall (a) Send (b) Help (c) Cancel
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Done button: 48 px tall
    Cancel button: 52 px tall
    Back button: 56 px tall (a) Done (b) Cancel (c) Save (d) Back
37. 37.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) dark blue on white (d) white on dark green
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Back button: 40 px tall
    Start button: 60 px tall
    Done button: 56 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Back button: 40 px tall
    Start button: 56 px tall (a) Done (b) Start (c) Back
40. 40.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) pale pink on white (d) black on yellow

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