App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 130 · 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. Which button is too small?
   Save button: 44 px tall
   Done button: 60 px tall
   Next button: 72 px tall (a) Next (b) Save (c) Done
2. 2.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
3. 3.True or false: buttons almost touching is good button design. (a) False (b) True
4. 4.True or false: a big, easy tap area is poor button design. (a) True (b) False
5. 5.Which colour pair is easy to read? (a) red on green (b) white on dark green (c) dark blue on black (d) light grey on white
6. 6.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 40 px tall
   Cancel button: 36 px tall
   Send button: 40 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
9. 9.True or false: strong colour contrast is good button design. (a) True (b) False
10. 10.True or false: space between buttons is good button design. (a) False (b) True
11. 11.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
13. 13.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
14. 14.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) dark blue on white (d) yellow on white
15. 15.True or false: grey text on grey is poor button design. (a) True (b) False
16. 16.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
18. 18.True or false: a clear word like Save is good button design. (a) True (b) False
19. 19.🌗 Is light grey on white 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 Cancel button is 28 px tall. How many px taller must it be?
21. 21.True or false: a tiny 20 px button is poor button design. (a) True (b) False
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Help button: 72 px tall
    Save button: 72 px tall (a) Help (b) Send (c) Save
23. 23.Which colour pair is hard to read? (a) light grey on white (b) black on pale grey (c) white on dark green (d) black on yellow
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Next button: 52 px tall
    Save button: 24 px tall (a) Send (b) Save (c) Next
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Help button: 56 px tall
    Next button: 52 px tall
    Cancel button: 36 px tall (a) Next (b) Start (c) Help (d) Cancel
26. 26.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
27. 27.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Send button: 56 px tall
    Next button: 44 px tall
    Start button: 52 px tall (a) Start (b) Back (c) Send (d) Next
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Next button: 40 px tall
    Cancel button: 56 px tall
    Back button: 60 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
34. 34.True or false: icons with no meaning is good button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Next button: 32 px tall
    Cancel button: 68 px tall
    Save button: 56 px tall (a) Cancel (b) Help (c) Save (d) Next
36. 36.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) black on yellow (d) red on green
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Done button: 64 px tall
    Back button: 60 px tall (a) Save (b) Done (c) Back
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
39. 39.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) red on green (d) dark blue on white
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Next button: 36 px tall
    Done button: 64 px tall

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