App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 161 · 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. The Save button is 44 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 64 px tall
   Done button: 60 px tall
   Save button: 52 px tall
   Back button: 60 px tall
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 32 px tall
   Next button: 40 px tall
   Back button: 60 px tall
   Help button: 36 px tall
5. 5.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) black on pale grey (d) red on green
6. 6.True or false: a tiny 20 px button is good button design. (a) False (b) True
7. 7.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
9. 9.True or false: a clear word like Save is good button design. (a) True (b) False
10. 10.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
11. 11.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
14. 14.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
15. 15.True or false: a big, easy tap area is good button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Done button: 60 px tall
    Back button: 56 px tall (a) Done (b) Next (c) Back
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
18. 18.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) black on yellow (d) pale pink on white
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Start button: 48 px tall
    Back button: 60 px tall (a) Start (b) Cancel (c) Back
20. 20.True or false: icons with no meaning is good button design. (a) True (b) False
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Next button: 56 px tall
    Cancel button: 72 px tall (a) Next (b) Cancel (c) Save
22. 22.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) dark blue on white (d) pale pink on white
23. 23.🌗 Is black on yellow 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. The Back button is 44 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Save button: 60 px tall
    Back button: 48 px tall
    Next button: 40 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Save button: 40 px tall
    Help button: 44 px tall
28. 28.🔘 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
    Save button: 52 px tall
    Cancel button: 56 px tall
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Save button: 40 px tall
    Cancel button: 32 px tall
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
32. 32.True or false: grey text on grey is poor button design. (a) True (b) False
33. 33.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) yellow on white (d) black on pale grey
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Send button: 72 px tall
    Done button: 48 px tall (a) Send (b) Done (c) Save
35. 35.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Back button: 68 px tall
    Start button: 68 px tall (a) Next (b) Start (c) Back
38. 38.True or false: space between buttons is poor button design. (a) True (b) False
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Start button: 32 px tall
    Help button: 32 px tall
    Cancel button: 56 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Send button: 64 px tall
    Done button: 40 px tall

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