App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 149 · 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: a big, easy tap area is good button design. (a) True (b) False
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
3. 3.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.True or false: buttons almost touching is good button design. (a) False (b) True
5. 5.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.Which colour pair is easy to read? (a) red on green (b) white on black (c) light grey on white (d) yellow on white
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 56 px tall
   Cancel button: 52 px tall
   Next button: 44 px tall
   Send button: 56 px tall
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 52 px tall
   Save button: 36 px tall
   Cancel button: 56 px tall (a) Done (b) Save (c) Cancel
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
12. 12.True or false: a big, easy tap area is poor button design. (a) True (b) False
13. 13.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
15. 15.True or false: a tiny 20 px button is good button design. (a) False (b) True
16. 16.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
18. 18.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on yellow (d) yellow on white
19. 19.True or false: a tiny 20 px button is poor button design. (a) False (b) True
20. 20.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) dark blue on white (d) black on yellow
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Cancel button: 64 px tall
    Save button: 48 px tall
    Done button: 56 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Cancel button: 56 px tall
    Start button: 60 px tall (a) Start (b) Back (c) Cancel
23. 23.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
24. 24.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.Which colour pair is hard to read? (a) black on yellow (b) light grey on white (c) white on dark green (d) white on black
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Send button: 48 px tall
    Back button: 40 px tall
27. 27.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) yellow on white (d) black on pale grey
28. 28.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.True or false: a clear word like Save is poor button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Start button: 32 px tall
    Back button: 36 px tall
    Send button: 32 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Back button: 40 px tall
    Cancel button: 48 px tall
    Send button: 48 px tall (a) Send (b) Back (c) Cancel (d) Done
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
33. 33.True or false: icons with no meaning is good button design. (a) False (b) True
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Save button: 32 px tall
    Send button: 44 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Next button: 68 px tall
    Save button: 48 px tall (a) Save (b) Next (c) Send
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Help button: 56 px tall
    Cancel button: 64 px tall (a) Help (b) Cancel (c) Save
37. 37.True or false: space between buttons is good button design. (a) False (b) True
38. 38.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) white on dark green (d) light grey on white
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?

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