App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 502 · 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.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 32 px tall
   Back button: 52 px tall
   Cancel button: 64 px tall (a) Back (b) Send (c) Cancel
3. 3.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
4. 4.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.True or false: buttons almost touching is poor button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 40 px tall
   Next button: 48 px tall
   Send button: 68 px tall
   Help button: 56 px tall (a) Send (b) Help (c) Next (d) Save
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
8. 8.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on dark green (d) dark blue on black
9. 9.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
10. 10.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
12. 12.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on yellow (d) light grey on white
13. 13.True or false: grey text on grey is good button design. (a) False (b) True
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Start button: 52 px tall
    Back button: 40 px tall (a) Back (b) Cancel (c) Start
15. 15.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) yellow on white (d) white on dark green
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Cancel button: 28 px tall
    Start button: 64 px tall (a) Start (b) Send (c) Cancel
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Cancel button: 64 px tall
    Back button: 32 px tall
    Send button: 52 px tall (a) Cancel (b) Back (c) Done (d) Send
20. 20.True or false: a clear word like Save is good button design. (a) True (b) False
21. 21.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) red on green (d) black on pale grey
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Cancel button: 68 px tall
    Help button: 56 px tall (a) Cancel (b) Help (c) Send
23. 23.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) pale pink on white (d) white on black
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Send button: 60 px tall
    Start button: 64 px tall
    Next button: 52 px tall (a) Start (b) Save (c) Next (d) Send
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Start button: 48 px tall
    Send button: 36 px tall (a) Start (b) Send (c) Done
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
27. 27.True or false: a tiny 20 px button is poor button design. (a) True (b) False
28. 28.True or false: strong colour contrast is good button design. (a) False (b) True
29. 29.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) dark blue on white (d) white on black
30. 30.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
32. 32.True or false: a tiny 20 px button is good button design. (a) False (b) True
33. 33.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
34. 34.True or false: a big, easy tap area is good button design. (a) False (b) True
35. 35.True or false: space between buttons is poor button design. (a) True (b) False
36. 36.True or false: a big, easy tap area is poor button design. (a) True (b) False
37. 37.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Done button: 56 px tall
    Cancel button: 64 px tall (a) Done (b) Cancel (c) Save
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
40. 40.True or false: strong colour contrast is poor button design. (a) True (b) False

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