App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 173 · 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.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) dark blue on black (d) red on green
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 60 px tall
   Done button: 72 px tall
   Help button: 36 px tall
   Send button: 68 px tall (a) Send (b) Done (c) Help (d) Back
3. 3.True or false: a big, easy tap area is poor button design. (a) True (b) False
4. 4.🌗 Is pale pink 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: strong colour contrast? (a) good design (b) poor design
6. 6.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) red on green (d) pale pink on white
7. 7.True or false: a clear word like Save is good button design. (a) False (b) True
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 64 px tall
   Next button: 40 px tall
   Cancel button: 40 px tall
   Done button: 44 px tall
9. 9.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Back button: 56 px tall
    Start button: 56 px tall (a) Start (b) Send (c) Back
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Next button: 64 px tall
    Start button: 64 px tall
    Cancel button: 64 px tall
12. 12.Which colour pair is hard to read? (a) red on green (b) black on yellow (c) white on dark green (d) white on black
13. 13.🌗 Is light grey on white 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. Which button is too small?
    Done button: 60 px tall
    Help button: 44 px tall
    Save button: 60 px tall (a) Save (b) Done (c) Help
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Help button: 72 px tall
    Save button: 64 px tall (a) Cancel (b) Save (c) Help
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
17. 17.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) pale pink on white (d) white on black
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
20. 20.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) red on green (d) dark blue on white
21. 21.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
22. 22.True or false: grey text on grey is good button design. (a) True (b) False
23. 23.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
27. 27.True or false: a tiny 20 px button is good button design. (a) False (b) True
28. 28.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Done button: 68 px tall
    Cancel button: 48 px tall
    Back button: 36 px tall (a) Send (b) Back (c) Cancel (d) Done
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Next button: 52 px tall
    Send button: 52 px tall
    Help button: 52 px tall (a) Send (b) Back (c) Help (d) Next
31. 31.True or false: icons with no meaning is good button design. (a) True (b) False
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Back button: 44 px tall
    Start button: 56 px tall
    Save button: 48 px tall (a) Help (b) Start (c) Back (d) Save
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Back button: 72 px tall
    Help button: 28 px tall
    Save button: 52 px tall (a) Back (b) Help (c) Next (d) Save
34. 34.True or false: grey text on grey is poor button design. (a) True (b) False
35. 35.True or false: buttons almost touching is good button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
37. 37.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
38. 38.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) black on pale grey (d) dark blue on black
39. 39.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Start button: 36 px tall
    Save button: 68 px tall
    Done button: 72 px tall (a) Save (b) Start (c) Cancel (d) Done

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