App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 547 · 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. The Save button is 36 px tall. How many px taller must it be?
2. 2.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
3. 3.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🌗 Is black on yellow 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: a big, easy tap area? (a) poor design (b) good design
6. 6.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on pale grey (d) light grey on white
7. 7.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 48 px tall
   Cancel button: 52 px tall
   Help button: 28 px tall (a) Help (b) Cancel (c) Start
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 60 px tall
   Help button: 72 px tall
   Done button: 28 px tall
   Start button: 72 px tall (a) Back (b) Help (c) Done (d) Start
10. 10.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) red on green (d) black on yellow
11. 11.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Done button: 40 px tall
    Start button: 48 px tall
    Send button: 60 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
15. 15.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Next button: 44 px tall
    Done button: 48 px tall
    Cancel button: 48 px tall
17. 17.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) white on black (d) pale pink on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Next button: 56 px tall
    Cancel button: 44 px tall
    Send button: 64 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Help button: 44 px tall
    Done button: 60 px tall
    Send button: 40 px tall
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
22. 22.True or false: a big, easy tap area is poor button design. (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Help button: 52 px tall
    Save button: 52 px tall (a) Save (b) Send (c) Help
24. 24.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
26. 26.True or false: a big, easy tap area is good button design. (a) False (b) True
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Next button: 52 px tall
    Back button: 32 px tall
    Cancel button: 60 px tall (a) Cancel (b) Back (c) Save (d) Next
28. 28.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
29. 29.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on white (d) red on green
30. 30.True or false: buttons almost touching is good button design. (a) True (b) False
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Help button: 60 px tall
    Start button: 36 px tall (a) Send (b) Help (c) Start
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Cancel button: 72 px tall
    Done button: 68 px tall
    Help button: 40 px tall (a) Done (b) Cancel (c) Send (d) Help
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Send button: 60 px tall
    Done button: 32 px tall
34. 34.Which colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) white on dark green (d) black on pale grey
35. 35.True or false: strong colour contrast is good button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Cancel button: 68 px tall
    Done button: 64 px tall
    Help button: 28 px tall (a) Cancel (b) Help (c) Done (d) Save
37. 37.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Start button: 60 px tall
    Done button: 52 px tall
39. 39.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Back button: 68 px tall
    Done button: 60 px tall
    Save button: 48 px tall (a) Cancel (b) Done (c) Save (d) Back

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