App Dev Worksheet: Button Size and Contrast

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

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