App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 301 · 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.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) dark blue on black (d) dark blue on white
2. 2.True or false: a big, easy tap area is poor button design. (a) False (b) True
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 48 px tall
   Next button: 56 px tall
   Send button: 28 px tall (a) Next (b) Help (c) Send
4. 4.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.True or false: grey text on grey is poor button design. (a) False (b) True
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 64 px tall
   Cancel button: 48 px tall
   Save button: 28 px tall
   Done button: 68 px tall (a) Done (b) Save (c) Cancel (d) Back
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 52 px tall
   Send button: 28 px tall
   Save button: 72 px tall (a) Done (b) Save (c) Send
8. 8.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) black on yellow (d) light grey on white
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
10. 10.True or false: strong colour contrast is poor button design. (a) True (b) False
11. 11.🌗 Is white on dark green 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. How many of these buttons follow the rule?
    Start button: 56 px tall
    Save button: 60 px tall
    Back button: 60 px tall
    Cancel button: 40 px tall
13. 13.True or false: buttons almost touching is poor button design. (a) True (b) False
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Done button: 72 px tall
    Next button: 44 px tall
    Cancel button: 72 px tall (a) Help (b) Cancel (c) Next (d) Done
16. 16.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
17. 17.True or false: a clear word like Save is good button design. (a) True (b) False
18. 18.True or false: a tiny 20 px button is good button design. (a) True (b) False
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Send button: 40 px tall
    Back button: 32 px tall
21. 21.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Start button: 40 px tall
    Save button: 56 px tall
23. 23.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
24. 24.Which colour pair is easy to read? (a) black on pale grey (b) pale pink on white (c) red on green (d) dark blue on black
25. 25.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Done button: 48 px tall
    Help button: 60 px tall (a) Help (b) Send (c) Done
28. 28.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Start button: 40 px tall
    Back button: 56 px tall
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Next button: 48 px tall
    Done button: 36 px tall (a) Next (b) Done (c) Cancel
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Back button: 56 px tall
    Start button: 48 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Start button: 48 px tall
    Save button: 72 px tall
    Back button: 60 px tall (a) Start (b) Save (c) Next (d) Back
36. 36.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on white (d) light grey on white
37. 37.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
38. 38.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
39. 39.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
40. 40.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read

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