App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 643 · 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. Which button is too small?
   Cancel button: 28 px tall
   Next button: 72 px tall
   Send button: 72 px tall
   Done button: 48 px tall (a) Send (b) Done (c) Cancel (d) Next
2. 2.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
3. 3.True or false: icons with no meaning is good button design. (a) True (b) False
4. 4.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) black on pale grey (d) yellow on white
5. 5.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) black on yellow (d) red on green
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 28 px tall
   Done button: 48 px tall
   Next button: 72 px tall
   Start button: 48 px tall (a) Start (b) Done (c) Next (d) Back
7. 7.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) light grey on white (d) pale pink on white
8. 8.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) yellow on white (d) white on black
9. 9.Which colour pair is hard to read? (a) pale pink on white (b) white on black (c) black on pale grey (d) dark blue on white
10. 10.🌗 Is black on yellow 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. The Help button is 40 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Help button: 40 px tall
    Next button: 36 px tall
15. 15.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
16. 16.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Start button: 28 px tall
    Done button: 48 px tall
    Save button: 64 px tall (a) Done (b) Save (c) Back (d) Start
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Send button: 44 px tall
    Start button: 56 px tall
    Cancel button: 64 px tall
19. 19.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) dark blue on white (d) yellow on white
20. 20.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
22. 22.True or false: a big, easy tap area is poor button design. (a) False (b) True
23. 23.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
26. 26.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Start button: 40 px tall
    Next button: 40 px tall
29. 29.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) light grey on white (d) dark blue on white
30. 30.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Send button: 32 px tall
    Next button: 52 px tall
    Cancel button: 68 px tall (a) Next (b) Send (c) Back (d) Cancel
32. 32.True or false: space between buttons is poor button design. (a) True (b) False
33. 33.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 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?
    Start button: 48 px tall
    Cancel button: 28 px tall
    Help button: 60 px tall
    Back button: 68 px tall (a) Cancel (b) Start (c) Help (d) Back
36. 36.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.True or false: a clear word like Save is poor button design. (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Done button: 64 px tall
    Next button: 28 px tall
    Help button: 56 px tall (a) Help (b) Done (c) Save (d) Next
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Save button: 52 px tall
    Start button: 32 px tall (a) Save (b) Start (c) Done
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?

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