App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 600 · 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: a tiny 20 px button? (a) good design (b) poor design
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 40 px tall
   Send button: 32 px tall
   Cancel button: 56 px tall
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
4. 4.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) light grey on white (d) black on pale grey
5. 5.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) dark blue on white (d) light grey on white
6. 6.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on black (d) red on green
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 44 px tall
   Done button: 64 px tall
   Help button: 44 px tall
   Start button: 36 px tall
8. 8.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
9. 9.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
10. 10.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Send button: 72 px tall
    Next button: 32 px tall (a) Cancel (b) Next (c) Send
12. 12.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
13. 13.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
14. 14.True or false: a tiny 20 px button is good button design. (a) True (b) False
15. 15.🌗 Is pale pink on white 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) black on pale grey (b) black on yellow (c) red on green (d) white on dark green
17. 17.True or false: strong colour contrast is poor button design. (a) True (b) False
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Help button: 60 px tall
    Next button: 60 px tall
19. 19.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) light grey on white (d) pale pink on white
20. 20.True or false: icons with no meaning is poor button design. (a) True (b) False
21. 21.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) light grey on white (d) black on yellow
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
23. 23.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
24. 24.True or false: a big, easy tap area is poor button design. (a) True (b) False
25. 25.True or false: icons with no meaning is good button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Next button: 60 px tall
    Send button: 60 px tall
27. 27.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Start button: 64 px tall
    Back button: 48 px tall
    Next button: 52 px tall (a) Start (b) Next (c) Done (d) Back
29. 29.True or false: a tiny 20 px button is poor button design. (a) True (b) False
30. 30.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) light grey on white (d) dark blue on white
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Send button: 52 px tall
    Save button: 64 px tall (a) Send (b) Save (c) Help
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Save button: 52 px tall
    Start button: 48 px tall
    Next button: 24 px tall (a) Next (b) Save (c) Start (d) Send
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Help button: 48 px tall
    Send button: 60 px tall
    Back button: 44 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
39. 39.True or false: space between buttons is good button design. (a) False (b) True
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Cancel button: 40 px tall
    Start button: 56 px tall
    Help button: 32 px tall

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