App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 54 · 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.True or false: space between buttons is good button design. (a) False (b) True
2. 2.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 64 px tall
   Cancel button: 48 px tall
   Start button: 40 px tall
4. 4.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 36 px tall
   Send button: 44 px tall
   Back button: 32 px tall
   Start button: 40 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 64 px tall
   Send button: 32 px tall
   Done button: 48 px tall
   Start button: 48 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 68 px tall
   Next button: 24 px tall
   Done button: 52 px tall (a) Next (b) Start (c) Done
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 56 px tall
   Start button: 24 px tall
   Save button: 72 px tall
   Help button: 60 px tall (a) Help (b) Save (c) Start (d) Next
10. 10.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) pale pink on white (d) white on black
11. 11.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) yellow on white (d) black on pale grey
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Send button: 56 px tall
    Cancel button: 68 px tall
    Save button: 44 px tall (a) Back (b) Send (c) Cancel (d) Save
13. 13.True or false: a clear word like Save is good button design. (a) True (b) False
14. 14.True or false: a big, easy tap area is good button design. (a) True (b) False
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Send button: 40 px tall
    Start button: 36 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Done button: 64 px tall
    Next button: 52 px tall
    Send button: 40 px tall
17. 17.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.True or false: icons with no meaning is poor button design. (a) False (b) True
19. 19.True or false: a clear word like Save is poor button design. (a) True (b) False
20. 20.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Done button: 36 px tall
    Cancel button: 64 px tall
    Next button: 60 px tall (a) Save (b) Next (c) Done (d) Cancel
22. 22.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
24. 24.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) dark blue on black (d) dark blue on white
25. 25.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Send button: 60 px tall
    Next button: 40 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Done button: 48 px tall
    Start button: 60 px tall (a) Done (b) Save (c) Start
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Cancel button: 36 px tall
    Next button: 64 px tall
29. 29.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) light grey on white (d) black on yellow
30. 30.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
33. 33.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
34. 34.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Done button: 24 px tall
    Start button: 72 px tall
    Cancel button: 52 px tall (a) Back (b) Done (c) Start (d) Cancel
36. 36.True or false: strong colour contrast is poor button design. (a) False (b) True
37. 37.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
38. 38.True or false: buttons almost touching is good button design. (a) True (b) False
39. 39.Which colour pair is hard to read? (a) light grey on white (b) white on dark green (c) black on pale grey (d) white on black
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Send button: 48 px tall
    Done button: 40 px tall
    Back button: 36 px tall

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