App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 543 · 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: grey text on grey? (a) good design (b) poor design
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 24 px tall
   Back button: 56 px tall
   Done button: 48 px tall (a) Back (b) Done (c) Cancel
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 24 px tall
   Help button: 52 px tall
   Start button: 60 px tall
   Done button: 48 px tall (a) Cancel (b) Help (c) Start (d) Done
5. 5.True or false: a clear word like Save is good button design. (a) False (b) True
6. 6.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.True or false: grey text on grey is poor button design. (a) False (b) True
8. 8.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) black on pale grey (d) light grey on white
9. 9.True or false: buttons almost touching is good button design. (a) True (b) False
10. 10.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Cancel button: 44 px tall
    Start button: 36 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Done button: 28 px tall
    Start button: 64 px tall (a) Done (b) Start (c) Save
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Help button: 60 px tall
    Start button: 44 px tall
    Save button: 68 px tall (a) Next (b) Start (c) Help (d) Save
15. 15.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
16. 16.True or false: grey text on grey is good button design. (a) False (b) True
17. 17.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Save button: 36 px tall
    Done button: 68 px tall (a) Save (b) Next (c) Done
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
21. 21.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.Which colour pair is hard to read? (a) white on black (b) red on green (c) white on dark green (d) dark blue on white
23. 23.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
25. 25.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
26. 26.True or false: buttons almost touching is poor button design. (a) True (b) False
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
28. 28.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
29. 29.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) light grey on white (d) dark blue on white
30. 30.True or false: strong colour contrast is poor button design. (a) True (b) False
31. 31.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
32. 32.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) light grey on white (d) white on dark green
33. 33.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) yellow on white (d) black on pale grey
34. 34.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
35. 35.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Save button: 40 px tall
    Send button: 40 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Save button: 72 px tall
    Start button: 56 px tall
    Help button: 40 px tall (a) Start (b) Save (c) Send (d) Help
39. 39.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Send button: 60 px tall
    Back button: 64 px tall
    Cancel button: 24 px tall (a) Start (b) Back (c) Cancel (d) Send

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