App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 445 · 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 this good or poor button design: buttons almost touching? (a) good design (b) poor design
2. 2.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
4. 4.Which colour pair is easy to read? (a) black on pale grey (b) red on green (c) yellow on white (d) light grey on white
5. 5.Which colour pair is hard to read? (a) red on green (b) white on black (c) black on pale grey (d) black on yellow
6. 6.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
7. 7.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.True or false: buttons almost touching is good button design. (a) True (b) False
9. 9.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) red on green (d) white on dark green
10. 10.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.True or false: a clear word like Save is good button design. (a) True (b) False
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Help button: 68 px tall
    Back button: 24 px tall
    Next button: 52 px tall (a) Help (b) Send (c) Next (d) Back
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Start button: 56 px tall
    Next button: 64 px tall
14. 14.True or false: buttons almost touching is poor button design. (a) True (b) False
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Done button: 64 px tall
    Save button: 44 px tall (a) Start (b) Done (c) Save
17. 17.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) dark blue on black (d) red on green
18. 18.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) yellow on white (d) white on black
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Next button: 68 px tall
    Save button: 36 px tall (a) Save (b) Done (c) Next
21. 21.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.True or false: a clear word like Save is poor button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Done button: 68 px tall
    Cancel button: 48 px tall (a) Cancel (b) Done (c) Save
24. 24.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
26. 26.True or false: grey text on grey is poor button design. (a) False (b) True
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Next button: 68 px tall
    Start button: 56 px tall (a) Cancel (b) Next (c) Start
28. 28.True or false: icons with no meaning is good button design. (a) False (b) True
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Help button: 36 px tall
    Start button: 32 px tall
30. 30.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) light grey on white (d) dark blue on white
31. 31.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.Which colour pair is easy to read? (a) black on yellow (b) light grey on white (c) pale pink on white (d) dark blue on black
33. 33.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) dark blue on black (d) black on yellow
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Back button: 36 px tall
    Start button: 32 px tall
    Cancel button: 60 px tall
35. 35.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Help button: 44 px tall
    Save button: 64 px tall
    Cancel button: 56 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Done button: 56 px tall
    Cancel button: 44 px tall
    Send button: 48 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Start button: 24 px tall
    Save button: 72 px tall (a) Cancel (b) Start (c) Save
40. 40.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design

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