App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 492 · 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: 36 px tall
   Cancel button: 64 px tall
   Send button: 60 px tall (a) Cancel (b) Send (c) Save
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 60 px tall
   Help button: 32 px tall
   Start button: 36 px tall
   Cancel button: 60 px tall
3. 3.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 28 px tall
   Done button: 72 px tall
   Save button: 48 px tall (a) Done (b) Save (c) Send
5. 5.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 44 px tall
   Start button: 40 px tall
   Cancel button: 32 px tall
   Save button: 40 px tall
7. 7.True or false: a clear word like Save is poor button design. (a) True (b) False
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
9. 9.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Back button: 52 px tall
    Cancel button: 52 px tall
    Send button: 44 px tall (a) Back (b) Cancel (c) Send (d) Save
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Start button: 40 px tall
    Cancel button: 40 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Send button: 48 px tall
    Next button: 72 px tall
    Help button: 40 px tall (a) Help (b) Send (c) Cancel (d) Next
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Done button: 56 px tall
    Save button: 56 px tall
    Cancel button: 56 px tall (a) Done (b) Save (c) Cancel (d) Back
14. 14.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Cancel button: 64 px tall
    Done button: 60 px tall
    Help button: 24 px tall (a) Help (b) Send (c) Cancel (d) Done
16. 16.True or false: buttons almost touching is good button design. (a) False (b) True
17. 17.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) pale pink on white (d) white on dark green
19. 19.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.True or false: a big, easy tap area is poor button design. (a) False (b) True
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Cancel button: 64 px tall
    Done button: 24 px tall (a) Cancel (b) Save (c) Done
22. 22.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Cancel button: 68 px tall
    Save button: 28 px tall (a) Save (b) Done (c) Cancel
24. 24.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on dark green (d) red on green
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Help button: 56 px tall
    Start button: 40 px tall
26. 26.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) light grey on white (d) black on pale grey
27. 27.True or false: a tiny 20 px button is poor button design. (a) False (b) True
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Save button: 48 px tall
    Help button: 32 px tall (a) Send (b) Save (c) Help
29. 29.True or false: buttons almost touching is poor button design. (a) False (b) True
30. 30.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) yellow on white (d) black on yellow
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Cancel button: 44 px tall
    Save button: 52 px tall (a) Next (b) Cancel (c) Save
34. 34.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) light grey on white (d) dark blue on white
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Back button: 64 px tall
    Send button: 52 px tall
    Done button: 40 px tall
36. 36.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
39. 39.True or false: a clear word like Save is good button design. (a) True (b) False
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?

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