App Dev Worksheet: Button Size and Contrast

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

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