App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 204 · 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: strong colour contrast? (a) good design (b) poor design
2. 2.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.True or false: space between buttons is poor button design. (a) True (b) False
4. 4.True or false: buttons almost touching is good button design. (a) True (b) False
5. 5.True or false: a clear word like Save is poor button design. (a) False (b) True
6. 6.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
7. 7.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) red on green (d) white on dark green
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 48 px tall
   Save button: 68 px tall
   Send button: 28 px tall
   Start button: 68 px tall (a) Send (b) Start (c) Save (d) Cancel
9. 9.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Next button: 72 px tall
    Done button: 44 px tall
    Help button: 64 px tall (a) Done (b) Save (c) Next (d) Help
12. 12.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) white on dark green (d) light grey on white
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Start button: 36 px tall
    Next button: 44 px tall
    Back button: 48 px tall
15. 15.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.True or false: a big, easy tap area is poor button design. (a) True (b) False
17. 17.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.True or false: a tiny 20 px button is poor button design. (a) False (b) True
19. 19.True or false: buttons almost touching is poor button design. (a) True (b) False
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Start button: 40 px tall
    Send button: 52 px tall
21. 21.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Save button: 60 px tall
    Cancel button: 56 px tall
    Next button: 56 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Start button: 64 px tall
    Next button: 32 px tall (a) Next (b) Back (c) Start
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Back button: 52 px tall
    Save button: 32 px tall
    Help button: 56 px tall
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Send button: 40 px tall
    Cancel button: 36 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Save button: 48 px tall
    Next button: 32 px tall
27. 27.Which colour pair is hard to read? (a) white on dark green (b) light grey on white (c) dark blue on white (d) black on yellow
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Done button: 52 px tall
    Back button: 60 px tall (a) Done (b) Help (c) Back
29. 29.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) pale pink on white (d) light grey on white
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Send button: 24 px tall
    Cancel button: 64 px tall (a) Cancel (b) Send (c) Done
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Start button: 52 px tall
    Save button: 32 px tall (a) Back (b) Save (c) Start
33. 33.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Start button: 60 px tall
    Done button: 32 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Help button: 32 px tall
    Done button: 48 px tall
36. 36.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Start button: 56 px tall
    Cancel button: 48 px tall
38. 38.True or false: grey text on grey is good button design. (a) True (b) False
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Done button: 52 px tall
    Cancel button: 32 px tall
    Send button: 56 px tall (a) Save (b) Send (c) Done (d) Cancel
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Help button: 56 px tall
    Back button: 52 px tall (a) Help (b) Back (c) Next

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