App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 233 · 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. How many of these buttons follow the rule?
   Cancel button: 40 px tall
   Send button: 56 px tall
   Next button: 56 px tall
2. 2.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
3. 3.True or false: strong colour contrast is poor button design. (a) False (b) True
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 48 px tall
   Cancel button: 40 px tall
   Save button: 68 px tall
   Done button: 64 px tall (a) Done (b) Save (c) Cancel (d) Next
5. 5.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.True or false: icons with no meaning is poor button design. (a) True (b) False
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 40 px tall
   Send button: 40 px tall
   Cancel button: 36 px tall
   Back button: 56 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
9. 9.True or false: a clear word like Save is good button design. (a) False (b) True
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
11. 11.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
12. 12.True or false: buttons almost touching is poor button design. (a) False (b) True
13. 13.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Start button: 60 px tall
    Next button: 64 px tall
    Save button: 40 px tall (a) Send (b) Start (c) Next (d) Save
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Send button: 48 px tall
    Cancel button: 72 px tall (a) Start (b) Cancel (c) Send
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Back button: 52 px tall
    Cancel button: 36 px tall
18. 18.Which colour pair is hard to read? (a) dark blue on white (b) yellow on white (c) white on black (d) black on yellow
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Start button: 64 px tall
    Next button: 28 px tall (a) Start (b) Next (c) Help
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Start button: 48 px tall
    Done button: 40 px tall
21. 21.True or false: a big, easy tap area is good button design. (a) True (b) False
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Start button: 64 px tall
    Next button: 40 px tall
    Cancel button: 60 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Help button: 68 px tall
    Save button: 28 px tall
    Send button: 56 px tall (a) Send (b) Help (c) Save (d) Cancel
24. 24.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
26. 26.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) black on pale grey (d) pale pink on white
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Cancel button: 36 px tall
    Help button: 32 px tall
    Start button: 56 px tall
29. 29.Which colour pair is easy to read? (a) dark blue on white (b) light grey on white (c) red on green (d) pale pink on white
30. 30.True or false: buttons almost touching is good button design. (a) True (b) False
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
32. 32.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Save button: 40 px tall
    Next button: 52 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Start button: 64 px tall
    Done button: 28 px tall (a) Back (b) Start (c) Done
35. 35.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🌗 Is white 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?
    Done button: 48 px tall
    Next button: 32 px tall
    Back button: 68 px tall
    Cancel button: 68 px tall (a) Done (b) Cancel (c) Next (d) Back
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Next button: 48 px tall
    Cancel button: 40 px tall
    Send button: 48 px tall (a) Send (b) Help (c) Cancel (d) Next
39. 39.True or false: a tiny 20 px button is good button design. (a) True (b) False
40. 40.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read

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