App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 523 · 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?
   Save button: 44 px tall
   Done button: 44 px tall
   Start button: 56 px tall
   Cancel button: 36 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 48 px tall
   Cancel button: 56 px tall
   Help button: 60 px tall
3. 3.True or false: a big, easy tap area is poor button design. (a) True (b) False
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 48 px tall
   Save button: 60 px tall
   Help button: 48 px tall
   Send button: 36 px tall
5. 5.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) white on black (d) dark blue on black
7. 7.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
8. 8.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Cancel button: 32 px tall
    Back button: 60 px tall
    Help button: 40 px tall
11. 11.True or false: icons with no meaning is poor button design. (a) True (b) False
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Send button: 52 px tall
    Next button: 28 px tall (a) Help (b) Send (c) Next
13. 13.True or false: grey text on grey is good button design. (a) True (b) False
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Help button: 48 px tall
    Save button: 40 px tall (a) Save (b) Next (c) Help
16. 16.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
17. 17.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
18. 18.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) red on green (d) white on dark green
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Next button: 72 px tall
    Cancel button: 36 px tall
    Send button: 56 px tall (a) Done (b) Send (c) Cancel (d) Next
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Start button: 68 px tall
    Send button: 56 px tall (a) Next (b) Send (c) Start
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Save button: 52 px tall
    Start button: 44 px tall
22. 22.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Send button: 52 px tall
    Cancel button: 36 px tall
24. 24.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
25. 25.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Cancel button: 52 px tall
    Done button: 52 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Back button: 72 px tall
    Send button: 36 px tall (a) Back (b) Save (c) Send
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Cancel button: 28 px tall
    Done button: 48 px tall
    Save button: 60 px tall (a) Back (b) Done (c) Cancel (d) Save
31. 31.True or false: buttons almost touching is poor button design. (a) True (b) False
32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
33. 33.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) red on green (d) black on pale grey
34. 34.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) white on black (d) black on pale grey
35. 35.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Start button: 56 px tall
    Next button: 48 px tall
    Save button: 56 px tall (a) Done (b) Save (c) Start (d) Next
37. 37.True or false: icons with no meaning is good button design. (a) True (b) False
38. 38.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) black on yellow (d) dark blue on white
39. 39.True or false: space between buttons is good button design. (a) False (b) True
40. 40.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read

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