App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 590 · 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: a tiny 20 px button? (a) good design (b) poor design
2. 2.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) pale pink on white (d) black on yellow
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 64 px tall
   Save button: 36 px tall
   Done button: 32 px tall
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
5. 5.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 36 px tall
   Help button: 60 px tall
   Save button: 68 px tall (a) Help (b) Save (c) Cancel
7. 7.True or false: strong colour contrast is poor button design. (a) True (b) False
8. 8.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) pale pink on white (d) dark blue on white
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 36 px tall
   Done button: 56 px tall
   Cancel button: 32 px tall
   Send button: 56 px tall
10. 10.True or false: space between buttons is poor button design. (a) False (b) True
11. 11.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Next button: 64 px tall
    Done button: 52 px tall
    Help button: 32 px tall (a) Next (b) Save (c) Done (d) Help
14. 14.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
15. 15.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.True or false: grey text on grey is poor button design. (a) False (b) True
19. 19.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on dark green (d) light grey on white
20. 20.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) white on black (d) black on yellow
21. 21.True or false: buttons almost touching is poor button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Help button: 64 px tall
    Cancel button: 24 px tall
    Send button: 56 px tall (a) Next (b) Help (c) Send (d) Cancel
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Back button: 36 px tall
    Save button: 32 px tall
    Send button: 64 px tall
24. 24.Which colour pair is easy to read? (a) pale pink on white (b) black on pale grey (c) red on green (d) light grey on white
25. 25.True or false: a big, easy tap area is good button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Back button: 40 px tall
    Help button: 56 px tall
    Send button: 36 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Next button: 24 px tall
    Send button: 68 px tall (a) Next (b) Start (c) Send
28. 28.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.True or false: icons with no meaning is poor button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Start button: 56 px tall
    Help button: 64 px tall
    Next button: 44 px tall
31. 31.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Help button: 40 px tall
    Back button: 36 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Back button: 36 px tall
    Save button: 56 px tall
    Start button: 32 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Back button: 48 px tall
    Save button: 48 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
36. 36.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) red on green (d) white on black
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Cancel button: 56 px tall
    Save button: 40 px tall
    Next button: 52 px tall (a) Send (b) Cancel (c) Next (d) Save
38. 38.True or false: grey text on grey is good button design. (a) False (b) True
39. 39.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) dark blue on black (d) white on dark green
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Cancel button: 40 px tall
    Back button: 36 px tall
    Save button: 64 px tall

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