App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 536 · 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 Back button is 32 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 48 px tall
   Start button: 56 px tall
   Cancel button: 40 px tall (a) Cancel (b) Save (c) Start
3. 3.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
4. 4.Which colour pair is hard to read? (a) red on green (b) black on yellow (c) black on pale grey (d) white on dark green
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 32 px tall
   Send button: 32 px tall
   Done button: 64 px tall
6. 6.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 64 px tall
   Cancel button: 24 px tall
   Help button: 52 px tall
   Done button: 68 px tall (a) Cancel (b) Help (c) Save (d) Done
8. 8.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) yellow on white (d) dark blue on white
9. 9.True or false: space between buttons is poor button design. (a) True (b) False
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Send button: 60 px tall
    Back button: 36 px tall
    Help button: 64 px tall
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Save button: 60 px tall
    Next button: 68 px tall
    Send button: 24 px tall (a) Next (b) Save (c) Send (d) Start
12. 12.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
13. 13.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) dark blue on white (d) yellow on white
14. 14.Which colour pair is easy to read? (a) white on black (b) pale pink on white (c) red on green (d) light grey on white
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Next button: 52 px tall
    Cancel button: 60 px tall (a) Next (b) Cancel (c) Done
16. 16.True or false: grey text on grey is good button design. (a) False (b) True
17. 17.True or false: a tiny 20 px button is good button design. (a) False (b) True
18. 18.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.🌗 Is dark blue on white 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?
    Start button: 24 px tall
    Back button: 56 px tall
    Help button: 60 px tall
    Next button: 72 px tall (a) Next (b) Help (c) Back (d) Start
21. 21.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.True or false: grey text on grey is poor button design. (a) False (b) True
23. 23.True or false: buttons almost touching is poor button design. (a) False (b) True
24. 24.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
25. 25.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
27. 27.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) pale pink on white (d) light grey on white
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Send button: 44 px tall
    Cancel button: 32 px tall
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
31. 31.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Next button: 64 px tall
    Save button: 64 px tall
    Help button: 24 px tall (a) Next (b) Help (c) Send (d) Save
33. 33.True or false: icons with no meaning is poor button design. (a) False (b) True
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Start button: 52 px tall
    Help button: 48 px tall
    Done button: 40 px tall (a) Next (b) Done (c) Help (d) Start
35. 35.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) black on pale grey (d) pale pink on white
36. 36.True or false: space between buttons is good button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Start button: 52 px tall
    Back button: 60 px tall
    Help button: 36 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Next button: 48 px tall
    Back button: 56 px tall (a) Next (b) Back (c) Send
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Back button: 44 px tall
    Start button: 52 px tall (a) Send (b) Back (c) Start
40. 40.True or false: a big, easy tap area is poor button design. (a) False (b) True

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