App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 234 · 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: buttons almost touching is good button design. (a) False (b) True
2. 2.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 56 px tall
   Back button: 64 px tall
   Help button: 48 px tall
   Cancel button: 44 px tall (a) Help (b) Cancel (c) Back (d) Done
4. 4.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
6. 6.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
7. 7.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 56 px tall
   Save button: 68 px tall
   Help button: 60 px tall
   Start button: 32 px tall (a) Start (b) Save (c) Done (d) Help
9. 9.True or false: a clear word like Save is good button design. (a) True (b) False
10. 10.True or false: buttons almost touching is poor button design. (a) True (b) False
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Next button: 48 px tall
    Back button: 52 px tall
    Help button: 60 px tall (a) Back (b) Help (c) Start (d) Next
12. 12.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Start button: 60 px tall
    Send button: 44 px tall
    Help button: 64 px tall
15. 15.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Next button: 40 px tall
    Save button: 32 px tall
17. 17.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) yellow on white (d) black on pale grey
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Next button: 72 px tall
    Back button: 72 px tall
    Start button: 68 px tall (a) Back (b) Start (c) Next (d) Done
19. 19.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) white on dark green (d) yellow on white
20. 20.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Help button: 52 px tall
    Done button: 52 px tall
    Send button: 48 px tall (a) Help (b) Send (c) Done (d) Cancel
23. 23.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) black on yellow (d) light grey on white
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Back button: 72 px tall
    Cancel button: 48 px tall (a) Save (b) Cancel (c) Back
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Start button: 40 px tall
    Done button: 48 px tall
    Back button: 52 px tall (a) Start (b) Cancel (c) Done (d) Back
27. 27.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Save button: 36 px tall
    Done button: 32 px tall
30. 30.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Back button: 56 px tall
    Save button: 32 px tall
    Next button: 52 px tall (a) Cancel (b) Back (c) Next (d) Save
32. 32.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) yellow on white (d) dark blue on white
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
35. 35.True or false: space between buttons is good button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Send button: 48 px tall
    Cancel button: 60 px tall
    Save button: 52 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
38. 38.True or false: a clear word like Save is poor button design. (a) False (b) True
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Next button: 44 px tall
    Send button: 60 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Back button: 48 px tall
    Next button: 52 px tall

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