App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 67 · 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 Next button is 28 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 52 px tall
   Next button: 44 px tall
   Start button: 56 px tall
   Back button: 48 px tall
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
6. 6.True or false: space between buttons is poor button design. (a) False (b) True
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
8. 8.True or false: strong colour contrast is good button design. (a) False (b) True
9. 9.True or false: icons with no meaning is poor button design. (a) True (b) False
10. 10.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Help button: 44 px tall
    Done button: 48 px tall
    Cancel button: 56 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Send button: 72 px tall
    Save button: 24 px tall
    Cancel button: 56 px tall (a) Cancel (b) Send (c) Help (d) Save
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Save button: 60 px tall
    Done button: 32 px tall (a) Save (b) Done (c) Help
17. 17.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Start button: 64 px tall
    Back button: 56 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Next button: 24 px tall
    Help button: 72 px tall
    Cancel button: 60 px tall (a) Next (b) Cancel (c) Back (d) Help
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Next button: 64 px tall
    Done button: 44 px tall
21. 21.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) light grey on white (d) black on pale grey
22. 22.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) red on green (d) yellow on white
23. 23.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on black (d) black on pale grey
26. 26.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
28. 28.True or false: a big, easy tap area is good button design. (a) False (b) True
29. 29.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) yellow on white (d) white on dark green
30. 30.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Send button: 40 px tall
    Start button: 64 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Cancel button: 48 px tall
    Back button: 56 px tall
33. 33.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Help button: 68 px tall
    Save button: 48 px tall
    Next button: 24 px tall (a) Save (b) Next (c) Help (d) Done
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Cancel button: 52 px tall
    Start button: 40 px tall
36. 36.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
37. 37.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) pale pink on white (d) dark blue on white
38. 38.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.True or false: grey text on grey is good button design. (a) True (b) False
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Done button: 48 px tall
    Next button: 56 px tall
    Start button: 48 px tall (a) Done (b) Start (c) Back (d) Next

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