App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 304 · 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 black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.True or false: a big, easy tap area is poor button design. (a) False (b) True
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
4. 4.True or false: a tiny 20 px button is good button design. (a) True (b) False
5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
6. 6.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 52 px tall
   Cancel button: 44 px tall
   Save button: 32 px tall
   Back button: 64 px tall
9. 9.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Save button: 56 px tall
    Back button: 36 px tall (a) Save (b) Back (c) Send
11. 11.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.True or false: buttons almost touching is poor button design. (a) False (b) True
13. 13.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) white on dark green (d) dark blue on white
14. 14.True or false: a big, easy tap area is good button design. (a) False (b) True
15. 15.True or false: buttons almost touching is good button design. (a) False (b) True
16. 16.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) light grey on white (d) white on dark green
17. 17.True or false: grey text on grey 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?
    Next button: 64 px tall
    Back button: 44 px tall
    Save button: 40 px tall
19. 19.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) dark blue on white (d) red on green
21. 21.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
25. 25.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) red on green (d) dark blue on white
26. 26.True or false: a clear word like Save is good button design. (a) False (b) True
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Done button: 40 px tall
    Save button: 72 px tall
    Next button: 72 px tall (a) Next (b) Done (c) Save (d) Send
28. 28.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) dark blue on black (d) white on black
29. 29.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) red on green (d) yellow on white
30. 30.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) dark blue on black (d) black on yellow
31. 31.True or false: strong colour contrast is poor button design. (a) False (b) True
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Cancel button: 72 px tall
    Done button: 56 px tall (a) Cancel (b) Save (c) Done
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Done button: 40 px tall
    Start button: 60 px tall
34. 34.True or false: icons with no meaning is good button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Start button: 60 px tall
    Save button: 56 px tall (a) Back (b) Start (c) Save
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Save button: 48 px tall
    Start button: 44 px tall (a) Back (b) Start (c) Save
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Done button: 52 px tall
    Cancel button: 56 px tall (a) Done (b) Save (c) Cancel
38. 38.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Back button: 48 px tall
    Done button: 60 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Help button: 32 px tall
    Cancel button: 56 px tall
    Done button: 36 px tall

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