App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 311 · 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 Done button is 24 px tall. How many px taller must it be?
2. 2.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) black on pale grey (d) yellow on white
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
5. 5.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
6. 6.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 40 px tall
   Back button: 64 px tall
   Cancel button: 68 px tall
   Next button: 60 px tall (a) Send (b) Next (c) Cancel (d) Back
8. 8.True or false: buttons almost touching is good button design. (a) False (b) True
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
10. 10.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Save button: 64 px tall
    Back button: 60 px tall (a) Save (b) Back (c) Send
12. 12.True or false: space between buttons is poor button design. (a) True (b) False
13. 13.True or false: strong colour contrast is poor button design. (a) True (b) False
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Next button: 56 px tall
    Cancel button: 36 px tall
    Help button: 64 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Save button: 32 px tall
    Back button: 48 px tall (a) Back (b) Help (c) Save
16. 16.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on black (d) red on green
17. 17.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Start button: 68 px tall
    Help button: 52 px tall
    Back button: 48 px tall (a) Back (b) Send (c) Start (d) Help
20. 20.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) yellow on white (d) black on pale grey
21. 21.True or false: icons with no meaning is good button design. (a) True (b) False
22. 22.Which colour pair is easy to read? (a) light grey on white (b) white on black (c) yellow on white (d) red on green
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
24. 24.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
26. 26.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.True or false: a clear word like Save is good button design. (a) True (b) False
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Start button: 44 px tall
    Back button: 40 px tall
    Done button: 56 px tall
29. 29.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Save button: 64 px tall
    Help button: 32 px tall
    Cancel button: 44 px tall
31. 31.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
32. 32.True or false: a big, easy tap area is poor button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Help button: 52 px tall
    Send button: 48 px tall
    Save button: 32 px tall
34. 34.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
35. 35.Which colour pair is easy to read? (a) black on yellow (b) dark blue on black (c) yellow on white (d) red on green
36. 36.Which colour pair is hard to read? (a) pale pink on white (b) black on pale grey (c) white on black (d) white on dark green
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Back button: 36 px tall
    Start button: 68 px tall (a) Help (b) Start (c) Back
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Done button: 32 px tall
    Back button: 56 px tall
    Next button: 32 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Done button: 48 px tall
    Start button: 40 px tall (a) Save (b) Done (c) Start

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