App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 585 · 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 white on black easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 48 px tall
   Send button: 68 px tall
   Back button: 44 px tall (a) Back (b) Help (c) Send
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
5. 5.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) dark blue on white (d) yellow on white
6. 6.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) pale pink on white (d) white on dark green
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 56 px tall
   Save button: 60 px tall
   Send button: 72 px tall
   Start button: 36 px tall (a) Cancel (b) Send (c) Save (d) Start
8. 8.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) dark blue on white (d) black on yellow
9. 9.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on pale grey (d) yellow on white
10. 10.True or false: strong colour contrast is good button design. (a) False (b) True
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Done button: 36 px tall
    Save button: 44 px tall
12. 12.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Done button: 32 px tall
    Save button: 56 px tall
14. 14.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
15. 15.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Start button: 56 px tall
    Save button: 56 px tall
17. 17.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
18. 18.🌗 Is white on dark green 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. The Next button is 24 px tall. How many px taller must it be?
20. 20.Which colour pair is easy to read? (a) white on black (b) red on green (c) dark blue on black (d) pale pink on white
21. 21.True or false: a tiny 20 px button is good button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
23. 23.True or false: grey text on grey is good button design. (a) False (b) True
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Done button: 52 px tall
    Send button: 48 px tall
    Next button: 56 px tall (a) Back (b) Done (c) Send (d) Next
25. 25.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
26. 26.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Start button: 52 px tall
    Send button: 68 px tall (a) Done (b) Send (c) Start
28. 28.True or false: icons with no meaning is good button design. (a) False (b) True
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Next button: 56 px tall
    Done button: 44 px tall
    Back button: 60 px tall
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
32. 32.True or false: a big, easy tap area is poor button design. (a) False (b) True
33. 33.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
34. 34.True or false: a big, easy tap area is good button design. (a) False (b) True
35. 35.Which colour pair is easy to read? (a) black on yellow (b) red on green (c) light grey on white (d) dark blue on black
36. 36.🌗 Is dark blue on black 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. Which button is too small?
    Save button: 48 px tall
    Done button: 52 px tall
    Cancel button: 32 px tall
    Back button: 60 px tall (a) Cancel (b) Back (c) Done (d) Save
38. 38.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Next button: 32 px tall
    Save button: 56 px tall (a) Send (b) Next (c) Save
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?

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