App Dev Worksheet: Button Size and Contrast

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

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