App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 24 · 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. The Next button is 28 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
3. 3.True or false: strong colour contrast is good button design. (a) True (b) False
4. 4.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 40 px tall
   Save button: 32 px tall
   Back button: 60 px tall
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 64 px tall
   Next button: 44 px tall
   Send button: 36 px tall
9. 9.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Done button: 36 px tall
    Cancel button: 68 px tall (a) Send (b) Cancel (c) Done
11. 11.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) dark blue on black (d) white on black
12. 12.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on pale grey (d) red on green
13. 13.True or false: buttons almost touching is good button design. (a) False (b) True
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Next button: 28 px tall
    Done button: 60 px tall
    Save button: 68 px tall (a) Save (b) Cancel (c) Next (d) Done
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Help button: 68 px tall
    Back button: 48 px tall (a) Help (b) Back (c) Cancel
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Done button: 36 px tall
    Next button: 40 px tall
    Cancel button: 36 px tall
17. 17.True or false: buttons almost touching is poor button design. (a) True (b) False
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
19. 19.Which colour pair is easy to read? (a) black on pale grey (b) dark blue on black (c) yellow on white (d) pale pink on white
20. 20.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.True or false: a clear word like Save is good button design. (a) True (b) False
22. 22.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.True or false: strong colour contrast is poor button design. (a) True (b) False
24. 24.True or false: a tiny 20 px button is good button design. (a) False (b) True
25. 25.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
26. 26.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) yellow on white (d) white on black
27. 27.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) light grey on white (d) dark blue on black
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 36 px tall
    Start button: 64 px tall
    Back button: 72 px tall
    Done button: 48 px tall (a) Back (b) Help (c) Done (d) Start
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
31. 31.🌗 Is black on yellow 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. Which button is too small?
    Next button: 56 px tall
    Start button: 60 px tall
    Help button: 44 px tall
    Done button: 56 px tall (a) Start (b) Done (c) Next (d) Help
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
34. 34.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) white on dark green (d) black on yellow
35. 35.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Done button: 56 px tall
    Save button: 56 px tall
    Send button: 44 px tall (a) Send (b) Done (c) Save (d) Cancel
38. 38.True or false: a clear word like Save is poor button design. (a) True (b) False
39. 39.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
40. 40.True or false: a big, easy tap area is good button design. (a) False (b) True

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