App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 620 · 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 this good or poor button design: space between buttons? (a) poor design (b) good design
2. 2.Which colour pair is easy to read? (a) white on black (b) light grey on white (c) dark blue on black (d) red on green
3. 3.Which colour pair is hard to read? (a) red on green (b) white on black (c) white on dark green (d) black on yellow
4. 4.True or false: space between buttons is poor button design. (a) True (b) False
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 36 px tall
   Done button: 44 px tall
   Back button: 40 px tall
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 72 px tall
   Save button: 64 px tall
   Cancel button: 32 px tall (a) Help (b) Cancel (c) Save
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 56 px tall
   Help button: 64 px tall
   Back button: 28 px tall (a) Done (b) Help (c) Back
8. 8.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) white on dark green (d) black on pale grey
10. 10.True or false: a clear word like Save is poor button design. (a) True (b) False
11. 11.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) pale pink on white (d) white on black
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
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. The Next button is 24 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
17. 17.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
19. 19.🌗 Is dark blue on black 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. How many of these buttons follow the rule?
    Next button: 64 px tall
    Send button: 52 px tall
    Back button: 52 px tall
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
23. 23.True or false: strong colour contrast is poor button design. (a) True (b) False
24. 24.True or false: a big, easy tap area is good button design. (a) True (b) False
25. 25.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) yellow on white (d) white on dark green
26. 26.True or false: icons with no meaning is poor button design. (a) False (b) True
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Next button: 44 px tall
    Cancel button: 44 px tall
28. 28.True or false: grey text on grey is good button design. (a) True (b) False
29. 29.True or false: strong colour contrast is good button design. (a) True (b) False
30. 30.True or false: a tiny 20 px button is poor button design. (a) True (b) False
31. 31.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) dark blue on black (d) yellow on white
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Next button: 36 px tall
    Save button: 60 px tall
    Back button: 36 px tall
33. 33.True or false: buttons almost touching is poor button design. (a) True (b) False
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Start button: 52 px tall
    Save button: 36 px tall
    Back button: 56 px tall (a) Cancel (b) Back (c) Save (d) Start
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Send button: 48 px tall
    Help button: 40 px tall (a) Help (b) Send (c) Back
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Send button: 52 px tall
    Next button: 56 px tall
    Done button: 52 px tall
38. 38.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Start button: 32 px tall
    Done button: 48 px tall (a) Start (b) Done (c) Send
40. 40.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design

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