App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 448 · 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 this good or poor button design: a clear word like Save? (a) good design (b) poor design
2. 2.True or false: a clear word like Save is poor button design. (a) True (b) False
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 44 px tall
   Cancel button: 48 px tall
   Done button: 32 px tall
   Start button: 32 px tall
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 56 px tall
   Send button: 72 px tall
   Next button: 56 px tall
   Start button: 36 px tall (a) Next (b) Save (c) Send (d) Start
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 32 px tall
   Save button: 32 px tall
   Next button: 60 px tall
8. 8.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) dark blue on black (d) black on yellow
11. 11.🌗 Is black on yellow 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 big, easy tap area? (a) poor design (b) good design
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
14. 14.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) dark blue on black (d) light grey on white
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
19. 19.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.True or false: icons with no meaning is poor button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Start button: 44 px tall
    Next button: 32 px tall
    Back button: 40 px tall
23. 23.True or false: space between buttons is poor button design. (a) False (b) True
24. 24.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Send button: 32 px tall
    Help button: 44 px tall
    Back button: 48 px tall
26. 26.Which colour pair is easy to read? (a) white on black (b) pale pink on white (c) red on green (d) dark blue on black
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Send button: 72 px tall
    Help button: 68 px tall (a) Save (b) Help (c) Send
28. 28.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
29. 29.Which colour pair is hard to read? (a) pale pink on white (b) white on dark green (c) black on yellow (d) white on black
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Send button: 60 px tall
    Save button: 32 px tall (a) Save (b) Send (c) Help
32. 32.True or false: a tiny 20 px button is poor button design. (a) False (b) True
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
34. 34.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Back button: 48 px tall
    Done button: 56 px tall
36. 36.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) light grey on white (d) black on pale grey
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Done button: 52 px tall
    Cancel button: 32 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Help button: 48 px tall
    Done button: 52 px tall
39. 39.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) light grey on white (d) pale pink on white
40. 40.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read

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