App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 135 · 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 red on green easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 52 px tall
   Done button: 60 px tall
   Help button: 40 px tall
5. 5.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
7. 7.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
8. 8.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) dark blue on black (d) white on dark green
9. 9.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) black on pale grey (d) dark blue on black
10. 10.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) red on green (d) white on dark green
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Back button: 56 px tall
    Start button: 52 px tall
    Next button: 48 px tall (a) Back (b) Next (c) Start (d) Help
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Cancel button: 36 px tall
    Start button: 40 px tall
13. 13.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Cancel button: 36 px tall
    Help button: 64 px tall (a) Back (b) Help (c) Cancel
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Cancel button: 40 px tall
    Back button: 44 px tall
    Send button: 40 px tall
17. 17.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Help button: 52 px tall
    Back button: 32 px tall
    Save button: 64 px tall (a) Help (b) Save (c) Send (d) Back
19. 19.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) dark blue on black (d) dark blue on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Start button: 44 px tall
    Next button: 64 px tall
21. 21.True or false: a clear word like Save is good button design. (a) True (b) False
22. 22.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Done button: 56 px tall
    Cancel button: 64 px tall (a) Done (b) Cancel (c) Save
24. 24.True or false: a big, easy tap area is poor button design. (a) True (b) False
25. 25.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) red on green (d) white on black
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Save button: 52 px tall
    Done button: 36 px tall (a) Done (b) Save (c) Help
28. 28.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Help button: 56 px tall
    Cancel button: 48 px tall
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Start button: 40 px tall
    Cancel button: 48 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Cancel button: 32 px tall
    Start button: 44 px tall
    Help button: 32 px tall
33. 33.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Next button: 56 px tall
    Send button: 56 px tall (a) Next (b) Cancel (c) Send
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
36. 36.True or false: buttons almost touching is poor button design. (a) False (b) True
37. 37.True or false: icons with no meaning is poor button design. (a) True (b) False
38. 38.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
40. 40.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) red on green (d) black on yellow

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