App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 608 · 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.Which colour pair is easy to read? (a) pale pink on white (b) black on pale grey (c) dark blue on black (d) yellow on white
2. 2.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
3. 3.True or false: space between buttons is poor button design. (a) True (b) False
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 52 px tall
   Send button: 32 px tall
   Back button: 48 px tall (a) Send (b) Help (c) Back
5. 5.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 56 px tall
   Help button: 68 px tall
   Start button: 36 px tall (a) Send (b) Start (c) Help
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 40 px tall
   Back button: 52 px tall
   Save button: 52 px tall
   Start button: 60 px tall
10. 10.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) yellow on white (d) dark blue on white
12. 12.True or false: space between buttons is good button design. (a) True (b) False
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Next button: 36 px tall
    Start button: 48 px tall
    Done button: 68 px tall (a) Start (b) Help (c) Next (d) Done
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
15. 15.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) white on black (d) dark blue on white
16. 16.True or false: a clear word like Save is poor button design. (a) False (b) True
17. 17.True or false: grey text on grey is poor button design. (a) True (b) False
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Save button: 60 px tall
    Back button: 48 px tall
19. 19.Which colour pair is easy to read? (a) dark blue on white (b) light grey on white (c) pale pink on white (d) red on green
20. 20.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.True or false: a tiny 20 px button is poor button design. (a) False (b) True
22. 22.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Back button: 60 px tall
    Start button: 72 px tall
    Cancel button: 36 px tall (a) Send (b) Back (c) Start (d) Cancel
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Help button: 48 px tall
    Next button: 60 px tall (a) Help (b) Cancel (c) Next
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Help button: 72 px tall
    Start button: 72 px tall (a) Help (b) Start (c) Next
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Send button: 60 px tall
    Start button: 52 px tall (a) Send (b) Start (c) Cancel
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Next button: 32 px tall
    Help button: 48 px tall
    Done button: 44 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Cancel button: 52 px tall
    Done button: 32 px tall
    Send button: 56 px tall (a) Start (b) Send (c) Cancel (d) Done
29. 29.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Done button: 68 px tall
    Send button: 36 px tall (a) Done (b) Help (c) Send
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Save button: 36 px tall
    Back button: 60 px tall
    Send button: 52 px tall (a) Save (b) Send (c) Cancel (d) Back
33. 33.True or false: icons with no meaning is good button design. (a) False (b) True
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
35. 35.Which colour pair is hard to read? (a) dark blue on white (b) light grey on white (c) white on dark green (d) black on pale grey
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
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.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
39. 39.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Save button: 60 px tall
    Back button: 60 px tall
    Help button: 60 px tall (a) Help (b) Next (c) Save (d) Back

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