App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 659 · 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. How many of these buttons follow the rule?
   Save button: 32 px tall
   Done button: 32 px tall
   Cancel button: 64 px tall
   Send button: 36 px tall
2. 2.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 56 px tall
   Cancel button: 72 px tall
   Done button: 32 px tall
   Save button: 60 px tall (a) Back (b) Save (c) Cancel (d) Done
4. 4.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
6. 6.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) red on green (d) black on yellow
7. 7.True or false: buttons almost touching is good button design. (a) True (b) False
8. 8.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.True or false: icons with no meaning is poor button design. (a) False (b) True
10. 10.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Start button: 60 px tall
    Send button: 68 px tall (a) Send (b) Start (c) Back
12. 12.True or false: space between buttons is poor button design. (a) False (b) True
13. 13.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on pale grey (d) pale pink on white
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Start button: 48 px tall
    Help button: 44 px tall
    Back button: 40 px tall
15. 15.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Back button: 48 px tall
    Done button: 40 px tall
    Send button: 52 px tall
17. 17.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) black on yellow (d) red on green
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 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?
    Cancel button: 56 px tall
    Save button: 44 px tall
    Start button: 44 px tall
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Back button: 32 px tall
    Done button: 36 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Back button: 44 px tall
    Send button: 52 px tall
    Help button: 72 px tall (a) Send (b) Help (c) Back (d) Save
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
24. 24.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
25. 25.True or false: a clear word like Save is poor button design. (a) False (b) True
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Save button: 40 px tall
    Send button: 56 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Cancel button: 60 px tall
    Next button: 44 px tall
28. 28.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) dark blue on white (d) light grey on white
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Start button: 48 px tall
    Help button: 72 px tall (a) Start (b) Send (c) Help
30. 30.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Cancel button: 56 px tall
    Next button: 52 px tall (a) Next (b) Cancel (c) Start
32. 32.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
33. 33.True or false: buttons almost touching is poor button design. (a) False (b) True
34. 34.Which colour pair is hard to read? (a) white on dark green (b) light grey on white (c) black on yellow (d) black on pale grey
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Help button: 52 px tall
    Start button: 40 px tall
    Cancel button: 32 px tall
36. 36.Which colour pair is easy to read? (a) red on green (b) white on black (c) pale pink on white (d) light grey on white
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Send button: 72 px tall
    Cancel button: 72 px tall
    Done button: 36 px tall (a) Cancel (b) Back (c) Done (d) Send
38. 38.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.Which colour pair is easy to read? (a) yellow on white (b) black on pale grey (c) red on green (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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