App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 479 · 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 this good or poor button design: a big, easy tap area? (a) poor design (b) good design
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 48 px tall
   Help button: 32 px tall
   Next button: 52 px tall (a) Next (b) Help (c) Done
3. 3.True or false: a big, easy tap area is poor button design. (a) True (b) False
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
5. 5.True or false: a clear word like Save is good button design. (a) True (b) False
6. 6.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) white on dark green (d) light grey on white
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 56 px tall
   Next button: 52 px tall
   Start button: 44 px tall
   Save button: 56 px tall (a) Done (b) Save (c) Next (d) Start
10. 10.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Back button: 40 px tall
    Cancel button: 64 px tall
    Save button: 64 px tall
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Help button: 56 px tall
    Cancel button: 32 px tall
    Save button: 40 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
15. 15.Which colour pair is hard to read? (a) dark blue on black (b) black on yellow (c) dark blue on white (d) white on dark green
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Start button: 56 px tall
    Save button: 48 px tall
    Back button: 24 px tall (a) Start (b) Save (c) Next (d) Back
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Done button: 56 px tall
    Start button: 28 px tall (a) Start (b) Done (c) Send
19. 19.Which colour pair is easy to read? (a) white on black (b) dark blue on black (c) red on green (d) light grey on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Start button: 64 px tall
    Back button: 32 px tall
21. 21.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
22. 22.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
23. 23.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) black on yellow (d) light grey on white
24. 24.True or false: space between buttons is good button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
26. 26.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Save button: 56 px tall
    Next button: 32 px tall
    Help button: 72 px tall (a) Save (b) Send (c) Next (d) Help
28. 28.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) black on yellow (d) yellow on white
29. 29.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
31. 31.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
32. 32.True or false: grey text on grey is poor button design. (a) True (b) False
33. 33.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Done button: 36 px tall
    Next button: 48 px tall
    Back button: 56 px tall (a) Cancel (b) Back (c) Done (d) Next
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Next button: 60 px tall
    Help button: 36 px tall
    Save button: 60 px tall
36. 36.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Done button: 68 px tall
    Next button: 64 px tall
    Send button: 56 px tall (a) Next (b) Send (c) Save (d) Done
38. 38.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on dark green (d) light grey on white
39. 39.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
40. 40.True or false: strong colour contrast is poor button design. (a) False (b) True

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