App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 449 · 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.Which colour pair is easy to read? (a) black on pale grey (b) red on green (c) dark blue on black (d) yellow on white
2. 2.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.True or false: a big, easy tap area is poor button design. (a) False (b) True
4. 4.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) light grey on white (d) white on black
5. 5.True or false: icons with no meaning is good button design. (a) True (b) False
6. 6.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 52 px tall
   Cancel button: 64 px tall
   Save button: 28 px tall (a) Cancel (b) Help (c) Save
8. 8.True or false: buttons almost touching is poor button design. (a) True (b) False
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 64 px tall
   Send button: 52 px tall
   Help button: 44 px tall
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Help button: 28 px tall
    Start button: 72 px tall (a) Save (b) Help (c) Start
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Back button: 48 px tall
    Help button: 64 px tall (a) Start (b) Back (c) Help
12. 12.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
13. 13.True or false: a tiny 20 px button is good button design. (a) False (b) True
14. 14.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) pale pink on white (d) black on pale grey
15. 15.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Help button: 60 px tall
    Cancel button: 28 px tall (a) Help (b) Send (c) Cancel
17. 17.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Next button: 68 px tall
    Help button: 60 px tall (a) Help (b) Start (c) Next
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Help button: 56 px tall
    Back button: 28 px tall (a) Cancel (b) Help (c) Back
20. 20.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) red on green (d) white on dark green
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
22. 22.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.True or false: strong colour contrast is good button design. (a) True (b) False
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Send button: 40 px tall
    Help button: 56 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Next button: 56 px tall
    Help button: 60 px tall
27. 27.True or false: grey text on grey is good button design. (a) False (b) True
28. 28.True or false: icons with no meaning is poor button design. (a) True (b) False
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Save button: 28 px tall
    Send button: 52 px tall
    Cancel button: 60 px tall (a) Done (b) Send (c) Save (d) Cancel
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
31. 31.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Send button: 56 px tall
    Help button: 56 px tall
    Back button: 64 px tall (a) Send (b) Help (c) Back (d) Cancel
33. 33.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) white on dark green (d) pale pink on white
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Next button: 24 px tall
    Send button: 48 px tall (a) Start (b) Send (c) Next
35. 35.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) dark blue on white (d) dark blue on black
36. 36.True or false: space between buttons is poor button design. (a) True (b) False
37. 37.True or false: a tiny 20 px button is poor button design. (a) True (b) False
38. 38.True or false: a clear word like Save is poor button design. (a) True (b) False
39. 39.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
40. 40.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read

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