App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 346 · 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 this good or poor button design: a big, easy tap area? (a) poor design (b) good design
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 48 px tall
   Cancel button: 36 px tall
   Send button: 56 px tall
3. 3.True or false: grey text on grey is poor button design. (a) False (b) True
4. 4.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) yellow on white (d) white on dark green
5. 5.Which colour pair is easy to read? (a) yellow on white (b) white on black (c) light grey on white (d) dark blue on black
6. 6.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) pale pink on white (d) dark blue on white
7. 7.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
8. 8.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 48 px tall
   Cancel button: 44 px tall
   Next button: 60 px tall
10. 10.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
11. 11.True or false: buttons almost touching is good button design. (a) False (b) True
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Save button: 60 px tall
    Help button: 24 px tall (a) Save (b) Cancel (c) Help
13. 13.True or false: strong colour contrast is good button design. (a) True (b) False
14. 14.True or false: space between buttons is poor button design. (a) True (b) False
15. 15.True or false: strong colour contrast is poor button design. (a) True (b) False
16. 16.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Done button: 48 px tall
    Start button: 56 px tall
    Cancel button: 24 px tall (a) Done (b) Back (c) Cancel (d) Start
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Next button: 36 px tall
    Start button: 60 px tall
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Back button: 44 px tall
    Cancel button: 36 px tall
    Send button: 56 px tall
21. 21.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) red on green (d) dark blue on white
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
23. 23.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
26. 26.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Cancel button: 52 px tall
    Back button: 56 px tall
    Help button: 36 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Back button: 64 px tall
    Cancel button: 44 px tall
29. 29.Which colour pair is hard to read? (a) light grey on white (b) white on dark green (c) white on black (d) black on pale grey
30. 30.True or false: space between buttons is good button design. (a) True (b) False
31. 31.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
33. 33.Which colour pair is easy to read? (a) black on pale grey (b) pale pink on white (c) light grey on white (d) dark blue on black
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.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) dark blue on black (d) black on pale grey
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Help button: 52 px tall
    Back button: 24 px tall
    Cancel button: 72 px tall (a) Back (b) Cancel (c) Help (d) Start
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Back button: 40 px tall
    Start button: 32 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Help button: 36 px tall
    Save button: 64 px tall
40. 40.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) dark blue on black (d) light grey on white

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