App Dev Worksheet: Button Size and Contrast

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

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