App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 540 · 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. The Help button is 24 px tall. How many px taller must it be?
2. 2.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 56 px tall
   Back button: 64 px tall
   Send button: 64 px tall
4. 4.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.True or false: strong colour contrast is good button design. (a) False (b) True
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 56 px tall
   Cancel button: 56 px tall
   Done button: 44 px tall
   Back button: 36 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
9. 9.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) yellow on white (d) dark blue on white
11. 11.True or false: icons with no meaning is poor button design. (a) False (b) True
12. 12.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
13. 13.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) black on yellow (d) red on green
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Help button: 56 px tall
    Done button: 68 px tall (a) Next (b) Done (c) Help
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Done button: 48 px tall
    Help button: 56 px tall (a) Done (b) Help (c) Next
17. 17.Which colour pair is easy to read? (a) white on dark green (b) yellow on white (c) dark blue on black (d) light grey on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Send button: 48 px tall
    Save button: 32 px tall
    Next button: 60 px tall
19. 19.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Next button: 40 px tall
    Cancel button: 72 px tall (a) Next (b) Help (c) Cancel
21. 21.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Help button: 40 px tall
    Start button: 48 px tall
23. 23.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Help button: 36 px tall
    Start button: 56 px tall
    Send button: 60 px tall
25. 25.True or false: a big, easy tap area is poor button design. (a) False (b) True
26. 26.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) black on pale grey (d) light grey on white
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Back button: 56 px tall
    Help button: 72 px tall
    Done button: 56 px tall (a) Done (b) Back (c) Help (d) Next
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Start button: 28 px tall
    Cancel button: 72 px tall (a) Cancel (b) Send (c) Start
30. 30.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
31. 31.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
33. 33.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.True or false: space between buttons is good button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Next button: 60 px tall
    Done button: 52 px tall
    Help button: 64 px tall (a) Done (b) Help (c) Next (d) Start
36. 36.True or false: a clear word like Save is good button design. (a) True (b) False
37. 37.True or false: grey text on grey is good button design. (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Help button: 64 px tall
    Done button: 56 px tall (a) Save (b) Done (c) Help
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Save button: 64 px tall
    Back button: 68 px tall (a) Back (b) Next (c) Save
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Cancel button: 60 px tall
    Save button: 60 px tall

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