App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 522 · 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. Which button is too small?
   Help button: 48 px tall
   Cancel button: 32 px tall
   Save button: 56 px tall
   Next button: 56 px tall (a) Save (b) Next (c) Help (d) Cancel
2. 2.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 32 px tall
   Send button: 44 px tall
   Help button: 32 px tall
   Cancel button: 32 px tall
4. 4.Which colour pair is hard to read? (a) yellow on white (b) white on dark green (c) white on black (d) black on yellow
5. 5.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 60 px tall
   Back button: 44 px tall
   Help button: 52 px tall
   Next button: 56 px tall (a) Save (b) Help (c) Back (d) Next
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 60 px tall
   Save button: 72 px tall
   Start button: 36 px tall (a) Start (b) Done (c) Save
9. 9.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.True or false: icons with no meaning is poor button design. (a) True (b) False
11. 11.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Help button: 44 px tall
    Start button: 52 px tall
    Save button: 56 px tall
13. 13.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Next button: 56 px tall
    Send button: 40 px tall
    Help button: 48 px tall (a) Send (b) Done (c) Next (d) Help
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Cancel button: 64 px tall
    Done button: 48 px tall
    Next button: 52 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
17. 17.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) white on dark green (d) dark blue on black
18. 18.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
19. 19.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
20. 20.Which colour pair is easy to read? (a) pale pink on white (b) black on pale grey (c) light grey on white (d) dark blue on black
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
22. 22.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) white on black (d) light grey on white
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Back button: 40 px tall
    Send button: 64 px tall
    Cancel button: 32 px tall
24. 24.True or false: a clear word like Save is poor button design. (a) True (b) False
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Done button: 48 px tall
    Cancel button: 52 px tall
26. 26.True or false: space between buttons is poor button design. (a) False (b) True
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Next button: 68 px tall
    Done button: 48 px tall (a) Save (b) Next (c) Done
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
29. 29.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
30. 30.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
31. 31.True or false: grey text on grey is poor button design. (a) False (b) True
32. 32.Which colour pair is hard to read? (a) black on pale grey (b) red on green (c) white on black (d) white on dark green
33. 33.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.Which colour pair is easy to read? (a) dark blue on white (b) light grey on white (c) dark blue on black (d) red on green
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Save button: 56 px tall
    Start button: 64 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Save button: 24 px tall
    Start button: 68 px tall
    Cancel button: 48 px tall (a) Start (b) Cancel (c) Save (d) Help
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Back button: 60 px tall
    Save button: 36 px tall
    Done button: 64 px tall
38. 38.True or false: a big, easy tap area is poor button design. (a) False (b) True
39. 39.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) pale pink on white (d) black on yellow
40. 40.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design

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