App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 276 · 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 red on green 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?
   Next button: 52 px tall
   Done button: 28 px tall
   Save button: 60 px tall (a) Done (b) Save (c) Next
3. 3.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 40 px tall
   Save button: 60 px tall
   Help button: 56 px tall
   Send button: 56 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 48 px tall
   Done button: 72 px tall
   Save button: 32 px tall (a) Done (b) Save (c) Next
6. 6.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
9. 9.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Send button: 44 px tall
    Save button: 60 px tall
    Back button: 64 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Back button: 64 px tall
    Cancel button: 28 px tall (a) Back (b) Cancel (c) Start
13. 13.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
15. 15.Which colour pair is easy to read? (a) black on yellow (b) light grey on white (c) pale pink on white (d) red on green
16. 16.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) black on pale grey (d) black on yellow
17. 17.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) dark blue on black (d) white on black
18. 18.True or false: space between buttons is poor button design. (a) False (b) True
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Done button: 72 px tall
    Send button: 36 px tall (a) Done (b) Start (c) Send
20. 20.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
22. 22.True or false: a big, easy tap area is good button design. (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Done button: 56 px tall
    Start button: 68 px tall (a) Start (b) Done (c) Save
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
25. 25.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) dark blue on black (d) white on dark green
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Back button: 56 px tall
    Done button: 60 px tall
    Send button: 64 px tall (a) Save (b) Done (c) Back (d) Send
27. 27.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.True or false: buttons almost touching is poor button design. (a) False (b) True
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
30. 30.True or false: a big, easy tap area is poor button design. (a) True (b) False
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Next button: 48 px tall
    Start button: 32 px tall
    Send button: 52 px tall
34. 34.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
35. 35.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.True or false: a tiny 20 px button is poor button design. (a) False (b) True
37. 37.True or false: a clear word like Save is poor button design. (a) True (b) False
38. 38.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) black on pale grey (d) yellow on white
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Help button: 40 px tall
    Send button: 64 px tall
40. 40.True or false: a tiny 20 px button is good button design. (a) False (b) True

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