App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 258 · 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 black on yellow 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?
   Send button: 32 px tall
   Next button: 52 px tall
   Help button: 60 px tall
   Done button: 48 px tall
3. 3.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) dark blue on white (d) yellow on white
4. 4.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.True or false: space between buttons is poor button design. (a) True (b) False
6. 6.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) dark blue on black (d) black on yellow
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 52 px tall
   Send button: 56 px tall
   Save button: 48 px tall
   Next button: 28 px tall (a) Next (b) Save (c) Cancel (d) Send
8. 8.True or false: buttons almost touching is good button design. (a) False (b) True
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 48 px tall
   Start button: 32 px tall
   Help button: 56 px tall
   Back button: 52 px tall
10. 10.Which colour pair is hard to read? (a) pale pink on white (b) black on yellow (c) white on black (d) white on dark green
11. 11.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) light grey on white (d) dark blue on black
12. 12.True or false: strong colour contrast is poor button design. (a) True (b) False
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Cancel button: 60 px tall
    Save button: 68 px tall (a) Send (b) Cancel (c) Save
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Cancel button: 52 px tall
    Help button: 56 px tall (a) Done (b) Help (c) Cancel
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Save button: 56 px tall
    Start button: 48 px tall (a) Start (b) Back (c) Save
16. 16.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) black on yellow (d) yellow on white
17. 17.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
18. 18.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Cancel button: 52 px tall
    Back button: 60 px tall
    Save button: 48 px tall
21. 21.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Start button: 52 px tall
    Help button: 56 px tall
    Back button: 36 px tall (a) Start (b) Help (c) Back (d) Next
25. 25.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) red on green (d) light grey on white
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Start button: 36 px tall
    Done button: 44 px tall
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
30. 30.True or false: a big, easy tap area is good button design. (a) True (b) False
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Send button: 72 px tall
    Help button: 40 px tall
    Next button: 52 px tall (a) Next (b) Start (c) Send (d) Help
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
34. 34.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
35. 35.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) light grey on white (d) white on black
36. 36.True or false: icons with no meaning is poor button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Save button: 40 px tall
    Send button: 52 px tall (a) Save (b) Send (c) Done
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
39. 39.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Back button: 60 px tall
    Send button: 28 px tall
    Help button: 68 px tall (a) Save (b) Help (c) Back (d) Send

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