App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 383 · 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?
   Start button: 48 px tall
   Send button: 60 px tall
   Done button: 56 px tall
   Help button: 36 px tall (a) Start (b) Done (c) Send (d) Help
2. 2.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) light grey on white (d) white on dark green
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
4. 4.True or false: strong colour contrast is poor button design. (a) True (b) False
5. 5.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 48 px tall
   Back button: 32 px tall
   Save button: 36 px tall
8. 8.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.True or false: a big, easy tap area is poor button design. (a) True (b) False
10. 10.True or false: buttons almost touching is good button design. (a) True (b) False
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
12. 12.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
13. 13.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
14. 14.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) yellow on white (d) dark blue on black
15. 15.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
16. 16.Which colour pair is easy to read? (a) dark blue on black (b) pale pink 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 28 px tall. How many px taller must it be?
18. 18.True or false: a tiny 20 px button is good button design. (a) False (b) True
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Next button: 40 px tall
    Help button: 56 px tall
    Back button: 32 px tall
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Start button: 24 px tall
    Cancel button: 64 px tall (a) Help (b) Start (c) Cancel
22. 22.True or false: icons with no meaning is poor 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?
    Send button: 40 px tall
    Help button: 52 px tall
    Save button: 52 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Help button: 52 px tall
    Save button: 48 px tall
    Send button: 60 px tall (a) Help (b) Send (c) Save (d) Back
25. 25.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.True or false: a clear word like Save is good button design. (a) False (b) True
27. 27.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
29. 29.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
30. 30.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on white (d) pale pink on white
33. 33.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Next button: 40 px tall
    Save button: 36 px tall
    Send button: 52 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Send button: 64 px tall
    Start button: 32 px tall (a) Send (b) Start (c) Next
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Help button: 40 px tall
    Done button: 40 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Save button: 52 px tall
    Next button: 36 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Start button: 68 px tall
    Cancel button: 48 px tall
    Back button: 48 px tall (a) Start (b) Cancel (c) Back (d) Save
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Cancel button: 32 px tall
    Done button: 52 px tall
    Start button: 40 px tall
40. 40.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read

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