App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 488 · 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.True or false: space between buttons is good button design. (a) False (b) True
3. 3.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) black on yellow (d) dark blue on black
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 56 px tall
   Save button: 56 px tall
   Send button: 44 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 72 px tall
   Back button: 52 px tall
   Next button: 36 px tall (a) Help (b) Next (c) Back
8. 8.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
9. 9.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) white on dark green (d) light grey on white
10. 10.True or false: a big, easy tap area is good button design. (a) False (b) True
11. 11.🌗 Is yellow 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: icons with no meaning? (a) good design (b) poor design
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
14. 14.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🔘 Is this good or poor button design: space between buttons? (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: 32 px tall
    Cancel button: 48 px tall
    Send button: 64 px tall
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Cancel button: 60 px tall
    Done button: 56 px tall (a) Cancel (b) Done (c) Next
18. 18.Which colour pair is hard to read? (a) pale pink on white (b) black on yellow (c) white on dark green (d) dark blue on white
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
20. 20.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Help button: 52 px tall
    Send button: 56 px tall (a) Back (b) Send (c) Help
22. 22.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) black on pale grey (d) yellow on white
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Back button: 28 px tall
    Help button: 64 px tall (a) Help (b) Back (c) Send
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Done button: 40 px tall
    Help button: 64 px tall
    Cancel button: 68 px tall (a) Save (b) Cancel (c) Done (d) Help
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Cancel button: 32 px tall
    Done button: 40 px tall
    Next button: 44 px tall
26. 26.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) dark blue on white (d) light grey on white
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Save button: 32 px tall
    Cancel button: 32 px tall
    Back button: 52 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Send button: 56 px tall
    Done button: 72 px tall
    Back button: 36 px tall (a) Send (b) Done (c) Cancel (d) Back
29. 29.Which colour pair is hard to read? (a) black on yellow (b) yellow on white (c) black on pale grey (d) dark blue on white
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Cancel button: 52 px tall
    Start button: 56 px tall (a) Send (b) Cancel (c) Start
31. 31.Which colour pair is hard to read? (a) dark blue on white (b) dark blue on black (c) black on pale grey (d) black on yellow
32. 32.True or false: a big, easy tap area is poor button design. (a) True (b) False
33. 33.True or false: a clear word like Save is good button design. (a) False (b) True
34. 34.True or false: a tiny 20 px button is poor button design. (a) False (b) True
35. 35.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) white on black (d) pale pink on white
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Next button: 48 px tall
    Cancel button: 52 px tall (a) Help (b) Cancel (c) Next
37. 37.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
39. 39.True or false: icons with no meaning is poor button design. (a) True (b) False
40. 40.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design

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