App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 442 · 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 black 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. Which button is too small?
   Back button: 64 px tall
   Help button: 36 px tall
   Start button: 48 px tall (a) Start (b) Back (c) Help
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 44 px tall
   Save button: 52 px tall
   Done button: 36 px tall
4. 4.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
5. 5.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
6. 6.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) white on black (d) dark blue on black
7. 7.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) black on yellow (d) dark blue on black
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 60 px tall
   Back button: 32 px tall
   Start button: 40 px tall
   Cancel button: 40 px tall
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
10. 10.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Next button: 44 px tall
    Help button: 52 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Save button: 68 px tall
    Start button: 60 px tall
    Next button: 40 px tall (a) Help (b) Save (c) Start (d) Next
13. 13.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Cancel button: 56 px tall
    Done button: 68 px tall
    Back button: 48 px tall (a) Back (b) Cancel (c) Help (d) Done
15. 15.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.True or false: buttons almost touching is good button design. (a) False (b) True
17. 17.True or false: strong colour contrast is poor button design. (a) False (b) True
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Cancel button: 40 px tall
    Send button: 64 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Cancel button: 52 px tall
    Send button: 52 px tall
    Next button: 64 px tall (a) Next (b) Send (c) Cancel (d) Back
20. 20.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Start button: 56 px tall
    Cancel button: 56 px tall (a) Cancel (b) Next (c) Start
22. 22.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Done button: 48 px tall
    Help button: 52 px tall
    Start button: 56 px tall (a) Done (b) Help (c) Send (d) Start
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Help button: 40 px tall
    Start button: 60 px tall
    Done button: 40 px tall
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Send button: 48 px tall
    Save button: 44 px tall (a) Send (b) Start (c) Save
26. 26.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) yellow on white (d) white on dark green
27. 27.True or false: grey text on grey is poor button design. (a) False (b) True
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Help button: 32 px tall
    Send button: 32 px tall
29. 29.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.Which colour pair is easy to read? (a) dark blue on black (b) white on dark green (c) light grey on white (d) red on green
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
32. 32.True or false: a big, easy tap area is poor button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Next button: 56 px tall
    Start button: 28 px tall (a) Send (b) Start (c) Next
34. 34.True or false: icons with no meaning is poor button design. (a) False (b) True
35. 35.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Start button: 60 px tall
    Help button: 56 px tall
    Back button: 48 px tall
38. 38.True or false: a tiny 20 px button is poor button design. (a) True (b) False
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
40. 40.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) pale pink on white (d) yellow on white

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