App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 164 · 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.True or false: a big, easy tap area is poor button design. (a) False (b) True
2. 2.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) white on black (d) light grey on white
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 32 px tall
   Save button: 72 px tall
   Next button: 64 px tall
   Help button: 68 px tall (a) Save (b) Help (c) Next (d) Done
5. 5.True or false: icons with no meaning is good button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 44 px tall
   Cancel button: 40 px tall
   Back button: 60 px tall
   Save button: 60 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 64 px tall
   Next button: 52 px tall
   Back button: 56 px tall
   Cancel button: 44 px tall (a) Back (b) Next (c) Done (d) Cancel
8. 8.True or false: a big, easy tap area is good button design. (a) True (b) False
9. 9.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) pale pink on white (d) white on dark green
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Send button: 24 px tall
    Next button: 64 px tall (a) Send (b) Help (c) Next
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.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) black on yellow (d) yellow on white
13. 13.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Start button: 52 px tall
    Done button: 44 px tall
17. 17.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
18. 18.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Next button: 64 px tall
    Back button: 48 px tall
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
22. 22.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
24. 24.Which colour pair is hard to read? (a) black on yellow (b) light grey on white (c) black on pale grey (d) white on dark green
25. 25.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) red on green (d) black on pale grey
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Start button: 44 px tall
    Cancel button: 36 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Cancel button: 64 px tall
    Next button: 36 px tall
    Done button: 40 px tall
28. 28.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) red on green (d) white on dark green
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Back button: 72 px tall
    Cancel button: 52 px tall (a) Back (b) Next (c) Cancel
30. 30.True or false: icons with no meaning is poor button design. (a) False (b) True
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Help button: 56 px tall
    Start button: 64 px tall
    Done button: 52 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Back button: 64 px tall
    Help button: 36 px tall
    Start button: 32 px tall
33. 33.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
34. 34.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
36. 36.True or false: a tiny 20 px button is good button design. (a) False (b) True
37. 37.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Next button: 60 px tall
    Done button: 48 px tall
    Send button: 32 px tall (a) Done (b) Back (c) Next (d) Send
40. 40.True or false: grey text on grey is good button design. (a) True (b) False

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