App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 22 · 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?
   Start button: 40 px tall
   Back button: 36 px tall
   Send button: 56 px tall
   Next button: 52 px tall
2. 2.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
3. 3.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) dark blue on white (d) black on yellow
4. 4.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.True or false: a big, easy tap area is good button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 24 px tall
   Start button: 48 px tall
   Save button: 52 px tall
   Next button: 64 px tall (a) Start (b) Save (c) Next (d) Help
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 72 px tall
   Help button: 68 px tall
   Back button: 28 px tall (a) Help (b) Next (c) Back
9. 9.True or false: strong colour contrast is good button design. (a) False (b) True
10. 10.True or false: buttons almost touching is good button design. (a) True (b) False
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
12. 12.True or false: buttons almost touching is poor button design. (a) True (b) False
13. 13.True or false: icons with no meaning is good button design. (a) True (b) False
14. 14.True or false: a clear word like Save is good button design. (a) True (b) False
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Done button: 24 px tall
    Back button: 48 px tall (a) Done (b) Back (c) Help
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Done button: 64 px tall
    Start button: 40 px tall
19. 19.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) black on yellow (d) pale pink on white
20. 20.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Cancel button: 52 px tall
    Done button: 44 px tall
    Save button: 52 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Next button: 64 px tall
    Help button: 60 px tall
    Back button: 68 px tall (a) Back (b) Next (c) Help (d) Cancel
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
24. 24.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Cancel button: 72 px tall
    Next button: 32 px tall (a) Cancel (b) Help (c) Next
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Next button: 68 px tall
    Send button: 64 px tall (a) Send (b) Save (c) Next
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
28. 28.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
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) white on dark green (b) black on yellow (c) black on pale grey (d) red on green
31. 31.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) pale pink on white (d) black on pale grey
32. 32.Which colour pair is easy to read? (a) red on green (b) white on dark green (c) yellow on white (d) light grey on white
33. 33.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) pale pink on white (d) dark blue on white
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Help button: 56 px tall
    Back button: 60 px tall
    Next button: 56 px tall (a) Next (b) Cancel (c) Back (d) Help
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
39. 39.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read

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