App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 389 · 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. Which button is too small?
   Done button: 24 px tall
   Help button: 60 px tall
   Start button: 72 px tall (a) Start (b) Help (c) Done
2. 2.True or false: a clear word like Save is poor button design. (a) False (b) True
3. 3.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) light grey on white (d) red on green
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 40 px tall
   Start button: 72 px tall
   Send button: 72 px tall
   Done button: 72 px tall (a) Next (b) Start (c) Send (d) Done
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
6. 6.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) dark blue on black (d) dark blue on white
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
9. 9.True or false: a tiny 20 px button is good button design. (a) True (b) False
10. 10.True or false: a big, easy tap area is good button design. (a) False (b) True
11. 11.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Start button: 44 px tall
    Save button: 68 px tall (a) Save (b) Start (c) Cancel
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Done button: 68 px tall
    Start button: 48 px tall
    Next button: 52 px tall (a) Send (b) Done (c) Next (d) Start
15. 15.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) light grey on white (d) white on dark green
16. 16.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) red on green (d) black on yellow
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Start button: 56 px tall
    Send button: 40 px tall
    Next button: 32 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
20. 20.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
21. 21.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
22. 22.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) white on dark green (d) light grey on white
23. 23.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Done button: 64 px tall
    Cancel button: 36 px tall (a) Done (b) Cancel (c) Next
25. 25.True or false: icons with no meaning is poor button design. (a) False (b) True
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Start button: 24 px tall
    Done button: 60 px tall
    Back button: 68 px tall (a) Done (b) Back (c) Start (d) Next
27. 27.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
28. 28.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Cancel button: 32 px tall
    Done button: 72 px tall (a) Cancel (b) Send (c) Done
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Back button: 64 px tall
    Help button: 64 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Back button: 48 px tall
    Start button: 68 px tall
    Done button: 28 px tall (a) Back (b) Save (c) Done (d) Start
33. 33.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Send button: 60 px tall
    Save button: 36 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Save button: 48 px tall
    Send button: 44 px tall
37. 37.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
38. 38.True or false: grey text on grey is good button design. (a) True (b) False
39. 39.Which colour pair is hard to read? (a) yellow on white (b) dark blue on white (c) white on dark green (d) white on black
40. 40.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read

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