App Dev Worksheet: Button Size and Contrast

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

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