App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 436 · 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 red on green easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 56 px tall
   Next button: 32 px tall
   Done button: 32 px tall
   Cancel button: 52 px tall
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 28 px tall
   Save button: 68 px tall
   Cancel button: 56 px tall (a) Save (b) Help (c) Cancel
4. 4.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on yellow (d) light grey on white
5. 5.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
6. 6.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 72 px tall
   Cancel button: 68 px tall
   Start button: 44 px tall (a) Cancel (b) Save (c) Start
8. 8.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 60 px tall
   Start button: 24 px tall
   Send button: 60 px tall (a) Cancel (b) Send (c) Start
10. 10.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Save button: 28 px tall
    Help button: 68 px tall
    Next button: 64 px tall (a) Done (b) Next (c) Help (d) Save
12. 12.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
13. 13.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
14. 14.True or false: strong colour contrast is good button design. (a) False (b) True
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Start button: 36 px tall
    Back button: 56 px tall
    Send button: 64 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Help button: 36 px tall
    Start button: 64 px tall
    Next button: 60 px tall (a) Help (b) Next (c) Back (d) Start
17. 17.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) red on green (d) dark blue on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Send button: 36 px tall
    Start button: 48 px tall (a) Send (b) Start (c) Cancel
20. 20.True or false: icons with no meaning is poor button design. (a) False (b) True
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Next button: 56 px tall
    Send button: 36 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Cancel button: 48 px tall
    Save button: 48 px tall
    Done button: 36 px tall
23. 23.True or false: space between buttons is poor button design. (a) False (b) True
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
25. 25.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Done button: 40 px tall
    Send button: 40 px tall
27. 27.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) white on dark green (d) pale pink on white
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Next button: 48 px tall
    Help button: 48 px tall
30. 30.True or false: buttons almost touching is poor button design. (a) False (b) True
31. 31.True or false: space between buttons is good button design. (a) False (b) True
32. 32.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) black on pale grey (d) red on green
34. 34.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
36. 36.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) white on black (d) dark blue on white
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Done button: 32 px tall
    Cancel button: 64 px tall (a) Done (b) Cancel (c) Help
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Send button: 64 px tall
    Done button: 28 px tall
    Back button: 72 px tall (a) Done (b) Cancel (c) Back (d) Send
39. 39.True or false: buttons almost touching is good button design. (a) True (b) False
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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