App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 493 · 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 Send button is 32 px tall. How many px taller must it be?
2. 2.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
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.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 36 px tall
   Cancel button: 64 px tall
   Next button: 40 px tall
7. 7.True or false: a big, easy tap area is good button design. (a) True (b) False
8. 8.True or false: a tiny 20 px button is poor button design. (a) False (b) True
9. 9.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 40 px tall
    Help button: 52 px tall (a) Save (b) Help (c) Cancel
11. 11.True or false: a clear word like Save is poor button design. (a) False (b) True
12. 12.Which colour pair is hard to read? (a) dark blue on white (b) light grey on white (c) black on yellow (d) white on black
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
14. 14.Which colour pair is hard to read? (a) dark blue on white (b) pale pink on white (c) white on black (d) black on pale grey
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Next button: 56 px tall
    Cancel button: 32 px tall
16. 16.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
17. 17.Which colour pair is easy to read? (a) dark blue on white (b) yellow on white (c) light grey on white (d) red on green
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Done button: 68 px tall
    Cancel button: 40 px tall
    Help button: 48 px tall (a) Next (b) Done (c) Help (d) Cancel
19. 19.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Cancel button: 64 px tall
    Help button: 32 px tall
    Save button: 64 px tall (a) Cancel (b) Save (c) Help (d) Send
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Next button: 40 px tall
    Save button: 64 px tall (a) Cancel (b) Next (c) Save
22. 22.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
23. 23.True or false: space between buttons is poor button design. (a) True (b) False
24. 24.Which colour pair is easy to read? (a) white on black (b) dark blue on black (c) light grey on white (d) red on green
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Next button: 36 px tall
    Start button: 56 px tall (a) Done (b) Next (c) Start
26. 26.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Cancel button: 28 px tall
    Save button: 64 px tall
    Done button: 56 px tall (a) Save (b) Done (c) Cancel (d) Start
28. 28.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) dark blue on black (d) black on pale grey
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Save button: 56 px tall
    Done button: 36 px tall
    Cancel button: 48 px tall (a) Cancel (b) Save (c) Start (d) Done
30. 30.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Cancel button: 72 px tall
    Back button: 64 px tall
    Save button: 48 px tall (a) Done (b) Save (c) Back (d) Cancel
32. 32.True or false: space between buttons is good button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Save button: 56 px tall
    Send button: 52 px tall
    Done button: 56 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
36. 36.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Cancel button: 52 px tall
    Help button: 56 px tall
    Send button: 24 px tall (a) Help (b) Done (c) Send (d) Cancel
38. 38.True or false: strong colour contrast is poor button design. (a) False (b) True
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
40. 40.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read

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