App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 531 · 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.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 64 px tall
   Send button: 52 px tall
   Done button: 48 px tall
3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 60 px tall
   Start button: 48 px tall
   Help button: 64 px tall
   Save button: 56 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
6. 6.True or false: icons with no meaning is good button design. (a) False (b) True
7. 7.True or false: space between buttons is good button design. (a) True (b) False
8. 8.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 72 px tall
   Done button: 52 px tall
   Back button: 36 px tall
   Save button: 68 px tall (a) Save (b) Send (c) Back (d) Done
10. 10.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Cancel button: 52 px tall
    Back button: 52 px tall (a) Cancel (b) Send (c) Back
12. 12.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
14. 14.True or false: strong colour contrast is good button design. (a) False (b) True
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
16. 16.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.True or false: a clear word like Save is poor button design. (a) False (b) True
18. 18.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) white on black (d) dark blue on white
19. 19.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Save button: 56 px tall
    Cancel button: 60 px tall
    Send button: 56 px tall (a) Cancel (b) Save (c) Send (d) Next
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Cancel button: 56 px tall
    Next button: 60 px tall (a) Next (b) Cancel (c) Send
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
25. 25.True or false: a tiny 20 px button is poor button design. (a) True (b) False
26. 26.Which colour pair is hard to read? (a) black on yellow (b) pale pink on white (c) white on dark green (d) black on pale grey
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Next button: 52 px tall
    Start button: 68 px tall (a) Next (b) Start (c) Cancel
28. 28.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) white on dark green (d) dark blue on black
29. 29.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Cancel button: 72 px tall
    Back button: 56 px tall (a) Next (b) Back (c) Cancel
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
33. 33.True or false: a tiny 20 px button is good button design. (a) False (b) True
34. 34.🌗 Is yellow on white 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. The Cancel button is 44 px tall. How many px taller must it be?
36. 36.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) red on green (d) pale pink on white
37. 37.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.True or false: grey text on grey is good button design. (a) True (b) False
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Start button: 52 px tall
    Help button: 64 px tall (a) Help (b) Back (c) Start
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Done button: 40 px tall
    Save button: 32 px tall
    Start button: 36 px tall

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