App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 565 · 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: a tiny 20 px button? (a) good design (b) poor design
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 56 px tall
   Help button: 32 px tall
   Done button: 64 px tall (a) Save (b) Help (c) Done
3. 3.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 60 px tall
   Send button: 64 px tall
   Next button: 52 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
6. 6.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) light grey on white (d) black on yellow
7. 7.True or false: strong colour contrast is poor button design. (a) True (b) False
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
10. 10.True or false: buttons almost touching is poor button design. (a) False (b) True
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Help button: 68 px tall
    Save button: 24 px tall (a) Help (b) Cancel (c) Save
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Send button: 40 px tall
    Save button: 64 px tall
13. 13.True or false: space between buttons is good button design. (a) True (b) False
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Start button: 64 px tall
    Done button: 68 px tall (a) Done (b) Start (c) Send
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Next button: 56 px tall
    Done button: 48 px tall (a) Start (b) Done (c) Next
16. 16.True or false: a clear word like Save is good button design. (a) False (b) True
17. 17.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Send button: 44 px tall
    Help button: 56 px tall (a) Help (b) Send (c) Save
19. 19.True or false: space between buttons is poor button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
21. 21.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) pale pink on white (d) white on black
22. 22.True or false: a clear word like Save is poor button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
24. 24.True or false: a tiny 20 px button is good button design. (a) False (b) True
25. 25.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) light grey on white (d) pale pink on white
26. 26.True or false: buttons almost touching is good button design. (a) False (b) True
27. 27.Which colour pair is easy to read? (a) dark blue on black (b) black on pale grey (c) red on green (d) light grey on white
28. 28.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Start button: 52 px tall
    Send button: 60 px tall
    Done button: 44 px tall (a) Help (b) Start (c) Done (d) Send
33. 33.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) dark blue on white (d) white on dark green
34. 34.True or false: a big, easy tap area is poor button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Cancel button: 48 px tall
    Help button: 64 px tall
    Save button: 48 px tall (a) Cancel (b) Save (c) Done (d) Help
36. 36.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) dark blue on black (d) black on pale grey
37. 37.True or false: a big, easy tap area is good button design. (a) True (b) False
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Save button: 64 px tall
    Cancel button: 48 px tall (a) Send (b) Save (c) Cancel
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?

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