App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 663 · 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?
   Send button: 68 px tall
   Help button: 40 px tall
   Back button: 60 px tall (a) Help (b) Send (c) Back
2. 2.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
4. 4.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on white (d) pale pink on white
5. 5.True or false: strong colour contrast is good button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
7. 7.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) black on yellow (d) pale pink on white
8. 8.True or false: space between buttons is poor button design. (a) True (b) False
9. 9.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on yellow (d) light grey on white
10. 10.True or false: buttons almost touching is good button design. (a) False (b) True
11. 11.Which colour pair is hard to read? (a) dark blue on black (b) dark blue on white (c) white on black (d) black on pale grey
12. 12.True or false: a clear word like Save is good button design. (a) False (b) True
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Next button: 68 px tall
    Done button: 36 px tall (a) Next (b) Done (c) Back
14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
15. 15.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Back button: 56 px tall
    Cancel button: 68 px tall
    Done button: 52 px tall (a) Back (b) Done (c) Help (d) Cancel
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Back button: 40 px tall
    Help button: 40 px tall
    Done button: 56 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Cancel button: 52 px tall
    Next button: 56 px tall
    Send button: 44 px tall (a) Send (b) Done (c) Cancel (d) Next
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Help button: 48 px tall
    Done button: 52 px tall (a) Save (b) Help (c) Done
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Save button: 40 px tall
    Send button: 60 px tall (a) Save (b) Send (c) Back
21. 21.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) white on black (d) light grey on white
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Save button: 56 px tall
    Next button: 36 px tall
23. 23.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) red on green (d) dark blue on white
24. 24.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
26. 26.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
27. 27.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) yellow on white (d) black on yellow
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Start button: 48 px tall
    Back button: 44 px tall
    Next button: 48 px tall (a) Start (b) Next (c) Back (d) Cancel
29. 29.Which colour pair is easy to read? (a) light grey on white (b) black on pale grey (c) red on green (d) dark blue on black
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Cancel button: 44 px tall
    Done button: 56 px tall (a) Done (b) Cancel (c) Next
31. 31.True or false: grey text on grey is poor button design. (a) False (b) True
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
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.True or false: icons with no meaning is poor button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Back button: 56 px tall
    Cancel button: 48 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Cancel button: 64 px tall
    Save button: 64 px tall
    Help button: 24 px tall (a) Help (b) Done (c) Cancel (d) Save
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
39. 39.True or false: icons with no meaning is good button design. (a) True (b) False
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?

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