App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 269 · 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: space between buttons? (a) poor design (b) good design
2. 2.True or false: strong colour contrast is good button design. (a) True (b) False
3. 3.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 64 px tall
   Help button: 52 px tall
   Back button: 60 px tall
   Send button: 32 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 48 px tall
   Save button: 28 px tall
   Start button: 64 px tall (a) Done (b) Start (c) Save
7. 7.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
8. 8.True or false: a big, easy tap area is poor button design. (a) False (b) True
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 40 px tall
   Send button: 40 px tall
   Save button: 40 px tall
   Cancel button: 60 px tall
10. 10.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Back button: 48 px tall
    Cancel button: 40 px tall
    Save button: 72 px tall (a) Cancel (b) Save (c) Back (d) Send
12. 12.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) red on green (d) white on black
13. 13.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
15. 15.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
18. 18.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
19. 19.True or false: a big, easy tap area is good button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Save button: 52 px tall
    Help button: 40 px tall
21. 21.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Start button: 56 px tall
    Back button: 52 px tall
    Save button: 72 px tall (a) Back (b) Start (c) Save (d) Done
23. 23.True or false: icons with no meaning is poor button design. (a) False (b) True
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
25. 25.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) white on black (d) yellow on white
26. 26.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Done button: 56 px tall
    Cancel button: 56 px tall
    Save button: 24 px tall (a) Send (b) Done (c) Cancel (d) Save
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Save button: 52 px tall
    Back button: 48 px tall
29. 29.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) white on dark green (d) light grey on white
30. 30.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
31. 31.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
33. 33.True or false: buttons almost touching is good button design. (a) False (b) True
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
35. 35.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) light grey on white (d) red on green
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 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: 44 px tall
    Done button: 40 px tall
    Start button: 52 px tall
    Help button: 60 px tall
39. 39.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
40. 40.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) black on yellow (d) dark blue on black

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