App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 592 · 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 black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 64 px tall
   Start button: 32 px tall
   Save button: 64 px tall
   Help button: 56 px tall (a) Start (b) Save (c) Help (d) Next
4. 4.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 60 px tall
   Save button: 48 px tall
   Send button: 32 px tall (a) Send (b) Save (c) Next
6. 6.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
7. 7.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
9. 9.True or false: a clear word like Save is poor button design. (a) True (b) False
10. 10.Which colour pair is hard to read? (a) white on black (b) dark blue on black (c) black on yellow (d) black on pale grey
11. 11.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
12. 12.True or false: icons with no meaning is poor button design. (a) False (b) True
13. 13.True or false: grey text on grey is poor button design. (a) True (b) False
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Start button: 48 px tall
    Send button: 56 px tall
    Help button: 24 px tall (a) Help (b) Back (c) Send (d) Start
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Done button: 32 px tall
    Start button: 36 px tall
    Send button: 56 px tall
16. 16.Which colour pair is hard to read? (a) dark blue on white (b) pale pink on white (c) white on black (d) black on yellow
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?
    Done button: 28 px tall
    Next button: 48 px tall
    Start button: 48 px tall (a) Start (b) Next (c) Done
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Done button: 44 px tall
    Help button: 40 px tall
20. 20.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
22. 22.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.True or false: a big, easy tap area is poor button design. (a) False (b) True
25. 25.True or false: a big, easy tap area is good button design. (a) False (b) True
26. 26.True or false: icons with no meaning is good button design. (a) True (b) False
27. 27.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.True or false: buttons almost touching is good button design. (a) False (b) True
29. 29.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.True or false: space between buttons is poor button design. (a) False (b) True
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Next button: 48 px tall
    Help button: 56 px tall (a) Start (b) Help (c) Next
32. 32.True or false: buttons almost touching is poor button design. (a) True (b) False
33. 33.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) yellow on white (d) red on green
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Next button: 52 px tall
    Start button: 56 px tall
    Save button: 52 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Help button: 48 px tall
    Next button: 48 px tall
    Cancel button: 48 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
37. 37.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Done button: 64 px tall
    Next button: 60 px tall (a) Save (b) Next (c) Done
39. 39.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
40. 40.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) black on yellow (d) white on dark green

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