App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 381 · 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 40 px tall. How many px taller must it be?
2. 2.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 52 px tall
   Save button: 36 px tall
   Help button: 48 px tall
   Next button: 40 px tall
7. 7.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
9. 9.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) black on yellow (d) light grey on white
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
11. 11.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) white on black (d) dark blue on white
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Back button: 36 px tall
    Done button: 32 px tall
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Save button: 24 px tall
    Cancel button: 52 px tall (a) Cancel (b) Save (c) Start
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Next button: 48 px tall
    Send button: 56 px tall
    Done button: 28 px tall (a) Next (b) Done (c) Cancel (d) Send
15. 15.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Start button: 56 px tall
    Cancel button: 36 px tall
    Next button: 56 px tall
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Cancel button: 52 px tall
    Help button: 68 px tall
    Next button: 68 px tall (a) Next (b) Cancel (c) Help (d) Save
19. 19.True or false: a clear word like Save is good button design. (a) True (b) False
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
21. 21.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
22. 22.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) pale pink on white (d) white on black
23. 23.🌗 Is pale pink on white 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.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Help button: 32 px tall
    Send button: 56 px tall (a) Send (b) Help (c) Done
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Save button: 44 px tall
    Back button: 56 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Help button: 64 px tall
    Start button: 60 px tall (a) Cancel (b) Start (c) Help
29. 29.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Cancel button: 52 px tall
    Done button: 48 px tall
31. 31.Which colour pair is hard to read? (a) black on yellow (b) yellow on white (c) dark blue on white (d) white on black
32. 32.True or false: a big, easy tap area is poor button design. (a) True (b) False
33. 33.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) dark blue on black (d) pale pink on white
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Next button: 68 px tall
    Send button: 48 px tall (a) Next (b) Send (c) Save
35. 35.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) white on dark green (d) dark blue on black
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Send button: 60 px tall
    Next button: 48 px tall
    Help button: 44 px tall (a) Send (b) Next (c) Help (d) Back
37. 37.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Back button: 56 px tall
    Save button: 64 px tall
    Help button: 44 px tall
39. 39.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
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Next button: 36 px tall
    Help button: 48 px tall

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