App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 392 · 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 this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
2. 2.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
3. 3.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 56 px tall
   Cancel button: 48 px tall
   Done button: 36 px tall
   Back button: 64 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 60 px tall
   Help button: 56 px tall
   Back button: 56 px tall
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 60 px tall
   Help button: 32 px tall
   Next button: 44 px tall
7. 7.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) black on yellow (d) dark blue on black
8. 8.True or false: strong colour contrast is good button design. (a) False (b) True
9. 9.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
11. 11.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.Which colour pair is hard to read? (a) white on black (b) yellow on white (c) white on dark green (d) dark blue on white
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
14. 14.True or false: a clear word like Save is good button design. (a) False (b) True
15. 15.True or false: space between buttons is poor button design. (a) True (b) False
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
18. 18.True or false: icons with no meaning is good button design. (a) False (b) True
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
20. 20.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) white on black (d) dark blue on black
22. 22.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.True or false: grey text on grey is good button design. (a) False (b) True
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Send button: 60 px tall
    Save button: 44 px tall
    Done button: 32 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Next button: 56 px tall
    Done button: 36 px tall
    Send button: 52 px tall (a) Done (b) Cancel (c) Next (d) Send
28. 28.True or false: icons with no meaning is poor button design. (a) True (b) False
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Start button: 56 px tall
    Send button: 56 px tall (a) Send (b) Back (c) Start
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
32. 32.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) light grey on white (d) dark blue on white
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Next button: 32 px tall
    Save button: 40 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Next button: 48 px tall
    Cancel button: 44 px tall
    Done button: 52 px tall (a) Next (b) Done (c) Cancel (d) Save
36. 36.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
37. 37.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Next button: 52 px tall
    Send button: 44 px tall
    Help button: 52 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Save button: 32 px tall
    Back button: 40 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Send button: 56 px tall
    Save button: 32 px tall
    Help button: 60 px tall

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