App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 674 · 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?
   Done button: 52 px tall
   Start button: 68 px tall
   Save button: 24 px tall
   Cancel button: 56 px tall (a) Done (b) Cancel (c) Start (d) Save
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 52 px tall
   Save button: 48 px tall
   Done button: 44 px tall
   Help button: 36 px tall
3. 3.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.🌗 Is yellow 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. How many of these buttons follow the rule?
   Save button: 36 px tall
   Start button: 64 px tall
   Send button: 36 px tall
6. 6.True or false: a big, easy tap area is poor button design. (a) False (b) True
7. 7.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) yellow on white (d) dark blue on black
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 72 px tall
   Start button: 28 px tall
   Next button: 72 px tall (a) Save (b) Start (c) Next
9. 9.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) black on pale grey (d) dark blue on black
10. 10.True or false: a big, easy tap area is good button design. (a) True (b) False
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Save button: 56 px tall
    Help button: 28 px tall (a) Help (b) Send (c) Save
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Start button: 68 px tall
    Send button: 44 px tall
    Help button: 72 px tall (a) Send (b) Help (c) Save (d) Start
13. 13.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) white on black (d) red on green
15. 15.True or false: a tiny 20 px button is good button design. (a) True (b) False
16. 16.True or false: space between buttons is poor button design. (a) True (b) False
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Next button: 56 px tall
    Save button: 52 px tall (a) Help (b) Save (c) Next
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Help button: 24 px tall
    Back button: 60 px tall (a) Start (b) Back (c) Help
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Next button: 40 px tall
    Back button: 60 px tall
    Help button: 40 px tall
21. 21.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) light grey on white (d) black on yellow
22. 22.True or false: strong colour contrast is good button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Help button: 44 px tall
    Save button: 60 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Cancel button: 44 px tall
    Save button: 32 px tall
25. 25.Which colour pair is hard to read? (a) black on pale grey (b) pale pink on white (c) white on dark green (d) dark blue on white
26. 26.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
28. 28.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Next button: 36 px tall
    Send button: 44 px tall
    Save button: 32 px tall
30. 30.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
32. 32.True or false: buttons almost touching is poor button design. (a) False (b) True
33. 33.True or false: a clear word like Save is poor button design. (a) True (b) False
34. 34.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Done button: 32 px tall
    Next button: 52 px tall (a) Help (b) Next (c) Done
36. 36.True or false: icons with no meaning is poor button design. (a) False (b) True
37. 37.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.True or false: grey text on grey is good 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: 56 px tall
    Back button: 56 px tall
    Start button: 60 px tall
    Done button: 40 px tall
40. 40.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design

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