App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 199 · 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. How many of these buttons follow the rule?
   Cancel button: 48 px tall
   Save button: 40 px tall
   Next button: 44 px tall
   Send button: 60 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 36 px tall
   Back button: 36 px tall
   Save button: 52 px tall
   Cancel button: 52 px tall
3. 3.True or false: space between buttons is good button design. (a) False (b) True
4. 4.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
6. 6.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) dark blue on white (d) light grey on white
8. 8.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
10. 10.True or false: a clear word like Save is good button design. (a) False (b) True
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Help button: 40 px tall
    Send button: 48 px tall
    Save button: 68 px tall (a) Done (b) Send (c) Help (d) Save
12. 12.Which colour pair is hard to read? (a) white on black (b) red on green (c) black on pale grey (d) white on dark green
13. 13.True or false: grey text on grey is good button design. (a) False (b) True
14. 14.True or false: buttons almost touching is good button design. (a) True (b) False
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Send button: 60 px tall
    Done button: 40 px tall
    Save button: 68 px tall (a) Help (b) Save (c) Done (d) Send
16. 16.True or false: a tiny 20 px button is good button design. (a) True (b) False
17. 17.Which colour pair is easy to read? (a) white on dark green (b) light grey on white (c) yellow on white (d) pale pink on white
18. 18.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Cancel button: 32 px tall
    Send button: 64 px tall
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Done button: 32 px tall
    Save button: 48 px tall
    Send button: 72 px tall (a) Start (b) Send (c) Done (d) Save
21. 21.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) pale pink on white (d) yellow on white
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Next button: 32 px tall
    Start button: 36 px tall
    Help button: 32 px tall
23. 23.True or false: a big, easy tap area is poor button design. (a) False (b) True
24. 24.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.True or false: space between buttons is poor button design. (a) False (b) True
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Back button: 60 px tall
    Next button: 28 px tall (a) Done (b) Next (c) Back
28. 28.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) white on black (d) white on dark green
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Cancel button: 60 px tall
    Save button: 32 px tall
    Back button: 44 px tall
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Help button: 24 px tall
    Next button: 52 px tall (a) Help (b) Back (c) Next
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
34. 34.True or false: a big, easy tap area is good button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Done button: 36 px tall
    Back button: 56 px tall
    Start button: 64 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Help button: 56 px tall
    Done button: 68 px tall (a) Done (b) Cancel (c) Help
37. 37.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
39. 39.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
40. 40.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read

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