App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 355 · 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 Done button is 36 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?
   Help button: 48 px tall
   Save button: 40 px tall
   Next button: 56 px tall
   Send button: 68 px tall (a) Save (b) Help (c) Next (d) Send
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 52 px tall
   Done button: 56 px tall
   Help button: 52 px tall
4. 4.True or false: a clear word like Save is poor button design. (a) False (b) True
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
6. 6.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
7. 7.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 44 px tall
   Send button: 52 px tall
   Next button: 68 px tall
   Save button: 48 px tall (a) Send (b) Next (c) Save (d) Cancel
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
10. 10.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
11. 11.True or false: grey text on grey is good button design. (a) False (b) True
12. 12.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
14. 14.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
15. 15.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.Which colour pair is hard to read? (a) red on green (b) white on dark green (c) black on yellow (d) white on black
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Back button: 56 px tall
    Done button: 48 px tall
    Help button: 64 px tall
18. 18.Which colour pair is hard to read? (a) white on black (b) light grey on white (c) dark blue on white (d) black on pale grey
19. 19.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) white on dark green (d) pale pink on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Start button: 68 px tall
    Send button: 24 px tall
    Next button: 56 px tall (a) Start (b) Done (c) Send (d) Next
22. 22.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on dark green (d) dark blue on black
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Back button: 56 px tall
    Save button: 40 px tall
25. 25.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
27. 27.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Next button: 44 px tall
    Done button: 44 px tall
29. 29.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
30. 30.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.True or false: space between buttons is good button design. (a) False (b) True
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Send button: 48 px tall
    Start button: 60 px tall (a) Done (b) Start (c) Send
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
36. 36.True or false: icons with no meaning is poor button design. (a) False (b) True
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Save button: 36 px tall
    Help button: 44 px tall
    Done button: 60 px tall
38. 38.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.True or false: buttons almost touching is good button design. (a) True (b) False
40. 40.True or false: strong colour contrast is good button design. (a) True (b) False

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