App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 607 · 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 dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 28 px tall
   Start button: 48 px tall
   Send button: 48 px tall (a) Start (b) Send (c) Done
4. 4.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 64 px tall
   Send button: 52 px tall
   Back button: 32 px tall (a) Back (b) Help (c) Send
8. 8.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) yellow on white (d) white on black
9. 9.True or false: icons with no meaning is good button design. (a) True (b) False
10. 10.True or false: space between buttons is good button design. (a) False (b) True
11. 11.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
13. 13.True or false: grey text on grey is poor button design. (a) False (b) True
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Start button: 72 px tall
    Next button: 64 px tall (a) Done (b) Start (c) Next
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Back button: 64 px tall
    Start button: 32 px tall (a) Next (b) Back (c) Start
16. 16.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) red on green (d) black on yellow
17. 17.True or false: buttons almost touching is poor button design. (a) True (b) False
18. 18.True or false: buttons almost touching is good button design. (a) True (b) False
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Next button: 48 px tall
    Help button: 28 px tall
    Done button: 56 px tall (a) Help (b) Done (c) Start (d) Next
20. 20.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
21. 21.True or false: a tiny 20 px button is poor button design. (a) False (b) True
22. 22.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.True or false: grey text on grey is good button design. (a) True (b) False
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Next button: 32 px tall
    Done button: 44 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Help button: 52 px tall
    Send button: 48 px tall
    Next button: 64 px tall
29. 29.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) black on yellow (d) dark blue on black
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Next button: 56 px tall
    Start button: 28 px tall (a) Save (b) Start (c) Next
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Send button: 40 px tall
    Next button: 40 px tall
    Save button: 48 px tall
32. 32.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Start button: 64 px tall
    Cancel button: 52 px tall
34. 34.True or false: a clear word like Save is good button design. (a) True (b) False
35. 35.True or false: strong colour contrast is poor button design. (a) True (b) False
36. 36.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) dark blue on white (d) dark blue on black
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Send button: 64 px tall
    Next button: 52 px tall
    Help button: 60 px tall (a) Cancel (b) Send (c) Help (d) Next
38. 38.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) white on black (d) yellow on white
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
40. 40.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design

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