App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 460 · 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 Save button is 24 px tall. How many px taller must it be?
2. 2.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
4. 4.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) dark blue on black (d) red on green
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 64 px tall
   Back button: 56 px tall
   Start button: 60 px tall
8. 8.True or false: a big, easy tap area is poor button design. (a) False (b) True
9. 9.True or false: a tiny 20 px button is poor button design. (a) True (b) False
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Save button: 40 px tall
    Back button: 72 px tall
    Send button: 64 px tall (a) Start (b) Send (c) Back (d) Save
11. 11.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
13. 13.True or false: a clear word like Save is poor button design. (a) True (b) False
14. 14.Which colour pair is hard to read? (a) red on green (b) dark blue on white (c) white on dark green (d) black on yellow
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Save button: 24 px tall
    Start button: 64 px tall
    Next button: 56 px tall (a) Done (b) Start (c) Save (d) Next
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Done button: 64 px tall
    Send button: 44 px tall
17. 17.True or false: buttons almost touching is good button design. (a) False (b) True
18. 18.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
19. 19.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) dark blue on black (d) yellow on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Next button: 32 px tall
    Start button: 64 px tall
    Help button: 64 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Send button: 32 px tall
    Cancel button: 32 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Help button: 56 px tall
    Next button: 52 px tall
24. 24.True or false: icons with no meaning is good button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Send button: 56 px tall
    Done button: 44 px tall
    Save button: 32 px tall
28. 28.Which colour pair is hard to read? (a) dark blue on black (b) dark blue on white (c) white on dark green (d) white on black
29. 29.True or false: space between buttons is good button design. (a) False (b) True
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Cancel button: 52 px tall
    Help button: 40 px tall
    Done button: 72 px tall (a) Done (b) Send (c) Help (d) Cancel
31. 31.True or false: buttons almost touching is poor button design. (a) True (b) False
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
33. 33.True or false: a tiny 20 px button is good button design. (a) True (b) False
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Back button: 56 px tall
    Start button: 36 px tall
    Send button: 32 px tall
35. 35.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Start button: 48 px tall
    Save button: 40 px tall (a) Done (b) Start (c) Save
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
38. 38.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) white on black (d) black on yellow
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
40. 40.True or false: icons with no meaning is poor button design. (a) True (b) False

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