App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 453 · 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
   Done button: 52 px tall
   Start button: 64 px tall
   Send button: 28 px tall (a) Send (b) Done (c) Start (d) Help
2. 2.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 32 px tall
   Start button: 32 px tall
   Send button: 40 px tall
4. 4.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) black on pale grey (d) yellow on white
5. 5.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) dark blue on black (d) white on black
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 68 px tall
   Back button: 60 px tall
   Save button: 40 px tall
   Help button: 48 px tall (a) Cancel (b) Back (c) Save (d) Help
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 60 px tall
   Cancel button: 64 px tall
   Send button: 36 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 44 px tall
   Start button: 60 px tall
   Send button: 56 px tall
   Next button: 56 px tall (a) Send (b) Next (c) Start (d) Back
9. 9.True or false: grey text on grey is good button design. (a) True (b) False
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
11. 11.True or false: icons with no meaning is poor button design. (a) False (b) True
12. 12.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Cancel button: 40 px tall
    Save button: 40 px tall
15. 15.Which colour pair is easy to read? (a) black on yellow (b) yellow on white (c) light grey on white (d) pale pink on white
16. 16.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
19. 19.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
20. 20.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Start button: 56 px tall
    Cancel button: 52 px tall
22. 22.Which colour pair is hard to read? (a) dark blue on white (b) light grey on white (c) white on dark green (d) white on black
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
25. 25.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
26. 26.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) red on green (d) black on yellow
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Cancel button: 36 px tall
    Help button: 32 px tall
    Send button: 64 px tall
29. 29.True or false: a tiny 20 px button is poor button design. (a) True (b) False
30. 30.True or false: space between buttons is good button design. (a) True (b) False
31. 31.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) yellow on white (d) light grey on white
32. 32.True or false: a clear word like Save is poor button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Help button: 36 px tall
    Back button: 44 px tall
    Save button: 64 px tall
34. 34.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
35. 35.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Save button: 28 px tall
    Next button: 60 px tall (a) Next (b) Save (c) Done
37. 37.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Cancel button: 60 px tall
    Help button: 44 px tall (a) Save (b) Cancel (c) Help
39. 39.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
40. 40.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read

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