App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 246 · 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 dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.True or false: a clear word like Save is good button design. (a) False (b) True
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
4. 4.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
5. 5.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 32 px tall
   Next button: 72 px tall
   Done button: 64 px tall (a) Next (b) Done (c) Start
7. 7.Which colour pair is easy to read? (a) red on green (b) white on black (c) yellow on white (d) light grey on white
8. 8.True or false: space between buttons is good button design. (a) False (b) True
9. 9.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) dark blue on black (d) black on pale grey
10. 10.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
11. 11.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
12. 12.True or false: a clear word like Save is poor button design. (a) False (b) True
13. 13.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
15. 15.True or false: grey text on grey is good button design. (a) False (b) True
16. 16.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) red on green (d) white on dark green
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Save button: 60 px tall
    Back button: 68 px tall (a) Save (b) Back (c) Next
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Next button: 40 px tall
    Save button: 32 px tall
19. 19.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Next button: 40 px tall
    Save button: 40 px tall
    Help button: 40 px tall
22. 22.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) black on yellow (d) dark blue on black
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Cancel button: 36 px tall
    Next button: 64 px tall
    Send button: 32 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Cancel button: 52 px tall
    Send button: 40 px tall
    Done button: 60 px tall (a) Help (b) Cancel (c) Done (d) Send
25. 25.Which colour pair is hard to read? (a) pale pink on white (b) white on dark green (c) white on black (d) black on pale grey
26. 26.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) black on pale grey (d) dark blue on black
27. 27.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Help button: 64 px tall
    Cancel button: 52 px tall
29. 29.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
30. 30.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) light grey on white (d) white on black
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Send button: 32 px tall
    Back button: 52 px tall
    Save button: 48 px tall (a) Back (b) Save (c) Send (d) Next
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Send button: 64 px tall
    Cancel button: 40 px tall
    Help button: 68 px tall (a) Next (b) Send (c) Cancel (d) Help
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Save button: 32 px tall
    Done button: 60 px tall
    Send button: 32 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
38. 38.True or false: buttons almost touching is good button design. (a) True (b) False
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Cancel button: 40 px tall
    Next button: 48 px tall
    Back button: 60 px tall (a) Back (b) Save (c) Cancel (d) Next
40. 40.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) white on dark green (d) light grey on white

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