App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 517 · 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.True or false: grey text on grey is good button design. (a) True (b) False
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
3. 3.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 32 px tall
   Done button: 64 px tall
   Next button: 44 px tall
   Back button: 36 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 40 px tall
   Back button: 36 px tall
   Start button: 40 px tall
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 52 px tall
   Save button: 24 px tall
   Help button: 52 px tall
   Next button: 68 px tall (a) Save (b) Next (c) Help (d) Start
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 36 px tall
   Help button: 72 px tall
   Send button: 48 px tall (a) Send (b) Help (c) Cancel
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
10. 10.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
12. 12.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) white on black (d) white on dark green
13. 13.Which colour pair is hard to read? (a) pale pink on white (b) black on pale grey (c) black on yellow (d) white on black
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 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?
    Done button: 40 px tall
    Help button: 72 px tall
    Next button: 72 px tall (a) Next (b) Done (c) Help
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Start button: 56 px tall
    Help button: 40 px tall (a) Start (b) Help (c) Next
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Send button: 40 px tall
    Done button: 40 px tall
    Save button: 48 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Help button: 60 px tall
    Start button: 44 px tall
    Next button: 40 px tall
19. 19.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Send button: 28 px tall
    Done button: 56 px tall
    Save button: 68 px tall (a) Save (b) Help (c) Done (d) Send
21. 21.True or false: icons with no meaning is poor button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Done button: 48 px tall
    Save button: 44 px tall (a) Save (b) Back (c) Done
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
24. 24.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.Which colour pair is hard to read? (a) black on pale grey (b) red on green (c) white on black (d) dark blue on white
26. 26.True or false: strong colour contrast is good button design. (a) True (b) False
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Send button: 40 px tall
    Help button: 56 px tall
28. 28.Which colour pair is easy to read? (a) white on black (b) yellow on white (c) dark blue on black (d) light grey on white
29. 29.True or false: a tiny 20 px button is poor button design. (a) True (b) False
30. 30.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Start button: 56 px tall
    Next button: 44 px tall
    Save button: 48 px tall (a) Start (b) Save (c) Send (d) Next
32. 32.Which colour pair is easy to read? (a) dark blue on white (b) light grey on white (c) red on green (d) yellow on white
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Help button: 28 px tall
    Start button: 72 px tall (a) Save (b) Help (c) Start
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Next button: 36 px tall
    Start button: 68 px tall
    Back button: 52 px tall (a) Next (b) Back (c) Start (d) Send
35. 35.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
38. 38.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
39. 39.True or false: buttons almost touching is good button design. (a) True (b) False
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?

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