App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 495 · 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) poor design (b) good design
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
4. 4.True or false: buttons almost touching is good button design. (a) True (b) False
5. 5.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
6. 6.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
7. 7.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 52 px tall
   Next button: 60 px tall
   Back button: 32 px tall
   Done button: 64 px tall (a) Next (b) Back (c) Done (d) Cancel
9. 9.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) white on black (d) black on yellow
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Start button: 68 px tall
    Send button: 48 px tall
    Help button: 48 px tall (a) Start (b) Done (c) Send (d) Help
11. 11.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) red on green (d) black on yellow
12. 12.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Back button: 60 px tall
    Start button: 36 px tall
    Cancel button: 72 px tall (a) Cancel (b) Help (c) Back (d) Start
14. 14.Which colour pair is easy to read? (a) light grey on white (b) black on pale grey (c) dark blue on black (d) yellow on white
15. 15.True or false: strong colour contrast is good button design. (a) True (b) False
16. 16.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.Which colour pair is hard to read? (a) black on yellow (b) pale pink on white (c) white on black (d) black on pale grey
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Next button: 48 px tall
    Done button: 64 px tall (a) Next (b) Done (c) Start
19. 19.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.True or false: a big, easy tap area is poor button design. (a) True (b) False
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) black on pale grey (b) red on green (c) dark blue on white (d) black on yellow
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Done button: 48 px tall
    Send button: 72 px tall
    Help button: 28 px tall (a) Done (b) Next (c) Send (d) Help
24. 24.True or false: buttons almost touching is poor button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
27. 27.True or false: grey text on grey is poor button design. (a) False (b) True
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Help button: 48 px tall
    Send button: 64 px tall (a) Done (b) Help (c) Send
29. 29.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save 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?
    Done button: 56 px tall
    Next button: 36 px tall
    Help button: 52 px tall
    Send button: 64 px tall (a) Help (b) Done (c) Next (d) Send
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Done button: 52 px tall
    Next button: 44 px tall
    Start button: 56 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Back button: 44 px tall
    Next button: 40 px tall
    Help button: 32 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Done button: 48 px tall
    Start button: 28 px tall (a) Start (b) Done (c) Save
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 48 px tall
    Send button: 52 px tall
    Start button: 28 px tall (a) Send (b) Save (c) Cancel (d) Start
37. 37.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.True or false: icons with no meaning is poor button design. (a) True (b) False
39. 39.True or false: a tiny 20 px button is good button design. (a) True (b) False
40. 40.Which colour pair is hard to read? (a) white on dark green (b) light grey on white (c) black on pale grey (d) black on yellow

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