App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 451 · 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. How many of these buttons follow the rule?
   Cancel button: 60 px tall
   Send button: 48 px tall
   Done button: 56 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 44 px tall
   Done button: 56 px tall
   Back button: 52 px tall (a) Save (b) Back (c) Done
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
4. 4.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
5. 5.Which colour pair is hard to read? (a) dark blue on black (b) white on black (c) white on dark green (d) dark blue on white
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 32 px tall
   Back button: 60 px tall
   Save button: 36 px tall
   Done button: 52 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 40 px tall
   Send button: 48 px tall
   Help button: 60 px tall
   Back button: 52 px tall (a) Help (b) Back (c) Next (d) Send
8. 8.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Done button: 52 px tall
    Send button: 52 px tall
    Help button: 60 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
13. 13.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) white on dark green (d) light grey on white
14. 14.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) red on green (d) black on pale grey
15. 15.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Help button: 60 px tall
    Next button: 48 px tall
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Help button: 40 px tall
    Next button: 72 px tall (a) Save (b) Next (c) Help
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Save button: 64 px tall
    Next button: 52 px tall
19. 19.Which colour pair is easy to read? (a) black on yellow (b) yellow on white (c) light grey on white (d) pale pink on white
20. 20.True or false: grey text on grey is poor button design. (a) True (b) False
21. 21.True or false: a big, easy tap area is good button design. (a) True (b) False
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Help button: 48 px tall
    Send button: 60 px tall
    Start button: 32 px tall (a) Next (b) Help (c) Start (d) Send
23. 23.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Start button: 68 px tall
    Done button: 24 px tall (a) Send (b) Start (c) Done
25. 25.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) black on yellow (d) yellow on white
26. 26.Which colour pair is easy to read? (a) white on black (b) dark blue on black (c) yellow on white (d) red on green
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
28. 28.True or false: a clear word like Save is poor button design. (a) False (b) True
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Next button: 60 px tall
    Save button: 32 px tall
    Done button: 52 px tall
30. 30.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
32. 32.True or false: buttons almost touching is poor button design. (a) False (b) True
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
34. 34.Which colour pair is hard to read? (a) light grey on white (b) white on dark green (c) white on black (d) dark blue on white
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Help button: 72 px tall
    Next button: 32 px tall (a) Next (b) Help (c) Send
36. 36.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Start button: 60 px tall
    Back button: 60 px tall
    Save button: 48 px tall
38. 38.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
39. 39.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Send button: 40 px tall
    Done button: 60 px tall (a) Done (b) Save (c) Send

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