App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 535 · 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.True or false: space between buttons is poor button design. (a) True (b) False
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 60 px tall
   Next button: 64 px tall
   Done button: 72 px tall
   Back button: 24 px tall (a) Done (b) Back (c) Next (d) Cancel
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
4. 4.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
5. 5.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 32 px tall
   Send button: 64 px tall
   Save button: 56 px tall
   Help button: 72 px tall (a) Save (b) Send (c) Help (d) Done
8. 8.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
9. 9.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
11. 11.True or false: buttons almost touching is poor button design. (a) True (b) False
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Back button: 52 px tall
    Help button: 68 px tall (a) Back (b) Help (c) Done
13. 13.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) black on yellow (d) red on green
14. 14.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) dark blue on black (d) white on black
15. 15.🌗 Is white on black 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. The Done button is 32 px tall. How many px taller must it be?
17. 17.True or false: a tiny 20 px button is good 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?
    Start button: 44 px tall
    Save button: 60 px tall
    Help button: 32 px tall
19. 19.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
21. 21.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
22. 22.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Send button: 52 px tall
    Help button: 24 px tall (a) Help (b) Next (c) Send
24. 24.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) yellow on white (d) white on dark green
25. 25.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) pale pink on white (d) black on pale grey
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Cancel button: 64 px tall
    Back button: 48 px tall
    Save button: 48 px tall (a) Cancel (b) Back (c) Help (d) Save
28. 28.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.Which colour pair is easy to read? (a) dark blue on white (b) yellow on white (c) pale pink on white (d) light grey on white
30. 30.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Cancel button: 60 px tall
    Next button: 40 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Start button: 64 px tall
    Help button: 52 px tall (a) Help (b) Send (c) Start
33. 33.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.Which colour pair is hard to read? (a) light grey on white (b) white on dark green (c) white on black (d) dark blue on white
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Send button: 60 px tall
    Cancel button: 56 px tall
    Done button: 56 px tall
36. 36.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Save button: 64 px tall
    Start button: 48 px tall
    Done button: 32 px tall
39. 39.True or false: strong colour contrast is poor button design. (a) False (b) True
40. 40.True or false: space between buttons is good button design. (a) True (b) False

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