App Dev Worksheet: Button Size and Contrast

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

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