App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 58 · 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 Save button is 28 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 28 px tall
   Send button: 60 px tall
   Cancel button: 68 px tall
   Save button: 68 px tall (a) Save (b) Cancel (c) Back (d) Send
3. 3.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.True or false: grey text on grey is poor button design. (a) False (b) True
5. 5.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 36 px tall
   Send button: 48 px tall
   Save button: 56 px tall
   Next button: 64 px tall (a) Next (b) Save (c) Send (d) Done
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 32 px tall
   Send button: 72 px tall
   Next button: 68 px tall (a) Send (b) Next (c) Back
8. 8.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) light grey on white (d) white on dark green
9. 9.True or false: a big, easy tap area is poor button design. (a) True (b) False
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Next button: 32 px tall
    Back button: 52 px tall
    Help button: 52 px tall (a) Done (b) Help (c) Next (d) Back
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
13. 13.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
15. 15.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) light grey on white (d) yellow on white
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Start button: 40 px tall
    Done button: 44 px tall
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Next button: 40 px tall
    Send button: 56 px tall
    Cancel button: 52 px tall
18. 18.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
19. 19.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) pale pink on white (d) black on pale grey
22. 22.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.True or false: a big, easy tap area is good button design. (a) True (b) False
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Send button: 56 px tall
    Next button: 36 px tall (a) Save (b) Send (c) Next
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Start button: 60 px tall
    Save button: 32 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Next button: 32 px tall
    Cancel button: 60 px tall
27. 27.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Save button: 32 px tall
    Send button: 32 px tall
    Help button: 32 px tall
29. 29.True or false: strong colour contrast is good button design. (a) False (b) True
30. 30.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.True or false: strong colour contrast is poor button design. (a) True (b) False
32. 32.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Start 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 24 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Start button: 64 px tall
    Send button: 40 px tall (a) Start (b) Send (c) Back
37. 37.True or false: space between buttons is poor button design. (a) False (b) True
38. 38.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Back button: 64 px tall
    Help button: 68 px tall
    Next button: 32 px tall (a) Help (b) Next (c) Back (d) Cancel
40. 40.Which colour pair is easy to read? (a) dark blue on black (b) black on yellow (c) yellow on white (d) red on green

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