App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 527 · 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 good button design. (a) False (b) True
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 56 px tall
   Next button: 32 px tall
   Start button: 40 px tall
3. 3.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
6. 6.True or false: grey text on grey is good button design. (a) True (b) False
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 52 px tall
   Cancel button: 68 px tall
   Next button: 72 px tall
   Start button: 32 px tall (a) Next (b) Cancel (c) Start (d) Done
8. 8.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on white (d) pale pink on white
9. 9.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
10. 10.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.True or false: buttons almost touching is good button design. (a) False (b) True
12. 12.Which colour pair is hard to read? (a) light grey on white (b) white on dark green (c) black on pale grey (d) black on yellow
13. 13.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Back button: 72 px tall
    Start button: 60 px tall (a) Back (b) Cancel (c) Start
15. 15.True or false: strong colour contrast is good button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Save button: 60 px tall
    Back button: 68 px tall (a) Back (b) Next (c) Save
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
18. 18.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) light grey on white (d) black on pale grey
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 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?
    Done button: 68 px tall
    Cancel button: 68 px tall
    Save button: 36 px tall
    Next button: 68 px tall (a) Next (b) Save (c) Done (d) Cancel
21. 21.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Cancel button: 48 px tall
    Help button: 48 px tall
    Start button: 24 px tall (a) Help (b) Cancel (c) Start (d) Next
23. 23.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) dark blue on white (d) yellow on white
25. 25.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
27. 27.True or false: a clear word like Save is good button design. (a) False (b) True
28. 28.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) pale pink on white (d) white on dark green
29. 29.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Back button: 60 px tall
    Save button: 60 px tall
31. 31.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Done button: 52 px tall
    Help button: 72 px tall
    Cancel button: 64 px tall (a) Save (b) Help (c) Cancel (d) Done
34. 34.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
35. 35.True or false: a tiny 20 px button is poor button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Help button: 36 px tall
    Back button: 56 px tall
    Save button: 56 px tall (a) Save (b) Back (c) Help (d) Done
37. 37.True or false: buttons almost touching is poor button design. (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Start button: 36 px tall
    Cancel button: 36 px tall
40. 40.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) light grey on white (d) black on yellow

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