App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 356 · 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. Which button is too small?
   Next button: 68 px tall
   Done button: 32 px tall
   Cancel button: 48 px tall
   Start button: 60 px tall (a) Start (b) Done (c) Cancel (d) Next
2. 2.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 72 px tall
   Back button: 52 px tall
   Done button: 24 px tall (a) Save (b) Back (c) Done
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
5. 5.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) white on black (d) light grey on white
6. 6.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
7. 7.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 52 px tall
   Send button: 60 px tall
   Cancel button: 48 px tall
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
10. 10.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
11. 11.Which colour pair is easy to read? (a) white on dark green (b) red on green (c) pale pink on white (d) light grey on white
12. 12.Which colour pair is hard to read? (a) light grey on white (b) dark blue on white (c) black on yellow (d) white on dark green
13. 13.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
15. 15.True or false: buttons almost touching is good button design. (a) True (b) False
16. 16.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on black (c) white on dark green (d) white on black
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Back button: 48 px tall
    Save button: 24 px tall
    Help button: 52 px tall (a) Save (b) Help (c) Back (d) Send
18. 18.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) light grey on white (d) dark blue on white
19. 19.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Send button: 44 px tall
    Start button: 40 px tall
    Cancel button: 32 px tall
21. 21.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) black on yellow (d) dark blue on black
22. 22.True or false: a clear word like Save is good button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Send button: 52 px tall
    Help button: 56 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Next button: 36 px tall
    Done button: 72 px tall
    Start button: 52 px tall (a) Next (b) Start (c) Done (d) Cancel
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
26. 26.🌗 Is dark blue on black 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?
    Help button: 64 px tall
    Done button: 52 px tall
    Next button: 36 px tall (a) Next (b) Help (c) Done
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Help button: 32 px tall
    Back button: 44 px tall
29. 29.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Send button: 52 px tall
    Help button: 56 px tall
    Save button: 52 px tall (a) Back (b) Help (c) Send (d) Save
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Back button: 56 px tall
    Next button: 28 px tall (a) Back (b) Next (c) Done
32. 32.True or false: buttons almost touching is poor button design. (a) True (b) False
33. 33.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.True or false: a tiny 20 px button is good button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Cancel button: 32 px tall
    Start button: 56 px tall
36. 36.True or false: a clear word like Save is poor button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Back button: 52 px tall
    Next button: 36 px tall
38. 38.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Save button: 64 px tall
    Send button: 32 px tall
    Next button: 60 px tall

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