App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 683 · 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.True or false: a clear word like Save is poor button design. (a) False (b) True
2. 2.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) white on black (d) light grey on white
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 68 px tall
   Back button: 24 px tall
   Help button: 60 px tall (a) Send (b) Back (c) Help
4. 4.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 72 px tall
   Send button: 24 px tall
   Save button: 48 px tall (a) Save (b) Back (c) Send
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 32 px tall
   Save button: 72 px tall
   Help button: 60 px tall (a) Start (b) Save (c) Help
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 36 px tall
   Save button: 40 px tall
   Back button: 40 px tall
   Send button: 40 px tall
8. 8.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Back button: 60 px tall
    Done button: 56 px tall
    Cancel button: 44 px tall (a) Start (b) Cancel (c) Done (d) Back
11. 11.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
12. 12.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) black on pale grey (d) light grey on white
14. 14.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
15. 15.True or false: icons with no meaning is poor button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Back button: 72 px tall
    Done button: 28 px tall (a) Help (b) Done (c) Back
17. 17.Which colour pair is easy to read? (a) white on black (b) yellow on white (c) light grey on white (d) red on green
18. 18.True or false: a big, easy tap area is poor button design. (a) False (b) True
19. 19.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) white on black (d) dark blue on black
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
21. 21.True or false: space between buttons is poor button design. (a) False (b) True
22. 22.True or false: a big, easy tap area is good button design. (a) False (b) True
23. 23.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.Which colour pair is hard to read? (a) black on pale grey (b) red on green (c) white on dark green (d) white on black
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Help button: 60 px tall
    Cancel button: 52 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Cancel button: 56 px tall
    Next button: 44 px tall (a) Back (b) Cancel (c) Next
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Back button: 72 px tall
    Help button: 40 px tall (a) Back (b) Help (c) Save
29. 29.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) red on green (d) white on dark green
30. 30.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) white on black (d) yellow on white
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
33. 33.True or false: a clear word like Save is good button design. (a) False (b) True
34. 34.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Done button: 64 px tall
    Start button: 68 px tall
    Cancel button: 56 px tall (a) Cancel (b) Start (c) Back (d) Done
36. 36.True or false: space between buttons is good button design. (a) False (b) True
37. 37.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Send button: 60 px tall
    Start button: 60 px tall
39. 39.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?

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