App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 421 · 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?
   Done button: 60 px tall
   Next button: 36 px tall
   Help button: 32 px tall
2. 2.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.True or false: a clear word like Save is good button design. (a) False (b) True
4. 4.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) black on pale grey (d) pale pink on white
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 52 px tall
   Back button: 60 px tall
   Next button: 36 px tall
   Send button: 52 px tall
6. 6.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on black (d) yellow on white
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 60 px tall
   Save button: 64 px tall
   Start button: 40 px tall
8. 8.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
10. 10.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Send button: 48 px tall
    Next button: 52 px tall
    Cancel button: 40 px tall (a) Send (b) Back (c) Next (d) Cancel
12. 12.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Back button: 52 px tall
    Next button: 64 px tall
    Help button: 36 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 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?
    Save button: 64 px tall
    Send button: 52 px tall
    Start button: 52 px tall
    Help button: 44 px tall (a) Start (b) Send (c) Save (d) Help
17. 17.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) pale pink on white (d) black on yellow
18. 18.True or false: space between buttons is good button design. (a) True (b) False
19. 19.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
21. 21.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
22. 22.Which colour pair is hard to read? (a) red on green (b) white on dark green (c) black on yellow (d) white on black
23. 23.🌗 Is yellow on white 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?
    Start button: 56 px tall
    Back button: 72 px tall
    Help button: 24 px tall (a) Back (b) Help (c) Start
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Next button: 44 px tall
    Start button: 56 px tall (a) Next (b) Save (c) Start
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
27. 27.True or false: strong colour contrast is poor button design. (a) True (b) False
28. 28.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
32. 32.True or false: grey text on grey is good button design. (a) True (b) False
33. 33.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Done button: 48 px tall
    Cancel button: 44 px tall
35. 35.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.True or false: a big, easy tap area is good button design. (a) False (b) True
37. 37.Which colour pair is easy to read? (a) white on dark green (b) light grey on white (c) dark blue on black (d) red on green
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Cancel button: 44 px tall
    Start button: 64 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Back button: 52 px tall
    Cancel button: 56 px tall (a) Back (b) Send (c) Cancel
40. 40.True or false: buttons almost touching is good button design. (a) False (b) True

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