App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 66 · 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 pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
3. 3.Which colour pair is hard to read? (a) white on black (b) light grey on white (c) white on dark green (d) black on yellow
4. 4.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
5. 5.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.True or false: space between buttons is poor button design. (a) True (b) False
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 60 px tall
   Done button: 52 px tall
   Cancel button: 36 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 40 px tall
   Send button: 68 px tall
   Help button: 48 px tall
   Save button: 56 px tall (a) Help (b) Send (c) Next (d) Save
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Save button: 32 px tall
    Start button: 72 px tall
    Back button: 60 px tall (a) Send (b) Save (c) Back (d) Start
11. 11.True or false: a big, easy tap area is good button design. (a) False (b) True
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Help button: 32 px tall
    Back button: 56 px tall (a) Next (b) Help (c) Back
13. 13.True or false: a clear word like Save is good button design. (a) False (b) True
14. 14.True or false: buttons almost touching is poor button design. (a) False (b) True
15. 15.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) light grey on white (d) dark blue on white
17. 17.True or false: strong colour contrast is poor button design. (a) False (b) True
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Cancel button: 48 px tall
    Start button: 44 px tall
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Start button: 52 px tall
    Save button: 24 px tall
    Next button: 72 px tall (a) Start (b) Next (c) Help (d) Save
21. 21.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
23. 23.True or false: a clear word like Save is poor button design. (a) True (b) False
24. 24.Which colour pair is easy to read? (a) red on green (b) white on black (c) light grey on white (d) dark blue on black
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Next button: 56 px tall
    Save button: 36 px tall
    Done button: 52 px tall (a) Start (b) Done (c) Next (d) Save
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Back button: 52 px tall
    Help button: 40 px tall
    Start button: 32 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Back button: 44 px tall
    Done button: 52 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
29. 29.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) white on dark green (d) white on black
30. 30.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Start button: 48 px tall
    Next button: 44 px tall
    Back button: 68 px tall (a) Done (b) Start (c) Next (d) Back
32. 32.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) red on green (d) black on pale grey
34. 34.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
35. 35.True or false: a big, easy tap area is poor button design. (a) False (b) True
36. 36.True or false: icons with no meaning is poor button design. (a) False (b) True
37. 37.True or false: a tiny 20 px button is good button design. (a) False (b) True
38. 38.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
40. 40.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read

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