App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 586 · 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.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) pale pink on white (d) dark blue on white
3. 3.Which colour pair is easy to read? (a) light grey on white (b) black on pale grey (c) red on green (d) pale pink on white
4. 4.🌗 Is white on dark green 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?
   Send button: 56 px tall
   Help button: 44 px tall
   Cancel button: 48 px tall (a) Help (b) Send (c) Cancel
6. 6.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) black on yellow (d) light grey on white
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
8. 8.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 64 px tall
   Send button: 56 px tall
   Help button: 48 px tall
   Cancel button: 24 px tall (a) Done (b) Send (c) Cancel (d) Help
10. 10.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Done button: 60 px tall
    Save button: 72 px tall (a) Done (b) Save (c) Help
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Save 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?
    Back button: 64 px tall
    Next button: 56 px tall
    Cancel button: 44 px tall
15. 15.True or false: icons with no meaning is poor button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Send button: 56 px tall
    Start button: 64 px tall
    Done button: 48 px tall (a) Send (b) Done (c) Start (d) Help
17. 17.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
18. 18.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Help button: 48 px tall
    Send button: 52 px tall (a) Start (b) Send (c) Help
20. 20.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
22. 22.True or false: a tiny 20 px button is good button design. (a) True (b) False
23. 23.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
24. 24.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Send button: 60 px tall
    Cancel button: 40 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Send button: 56 px tall
    Help button: 36 px tall (a) Done (b) Send (c) Help
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Start button: 60 px tall
    Help button: 60 px tall (a) Help (b) Start (c) Next
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Done button: 64 px tall
    Cancel button: 60 px tall
    Start button: 44 px tall (a) Start (b) Cancel (c) Back (d) Done
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Send button: 36 px tall
    Cancel button: 32 px tall
    Back button: 36 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Help button: 56 px tall
    Back button: 48 px tall
    Start button: 52 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Start button: 36 px tall
    Help button: 48 px tall (a) Start (b) Done (c) Help
33. 33.True or false: a clear word like Save is poor button design. (a) False (b) True
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Save button: 56 px tall
    Back button: 64 px tall
    Done button: 40 px tall (a) Done (b) Back (c) Help (d) Save
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
37. 37.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) dark blue on white (d) dark blue on black
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
39. 39.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) yellow on white (d) white on black
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?

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