App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 339 · 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?
   Save button: 56 px tall
   Next button: 32 px tall
   Help button: 36 px tall
   Cancel button: 40 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
3. 3.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) yellow on white (d) light grey on white
4. 4.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
6. 6.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) black on pale grey (d) pale pink on white
7. 7.True or false: buttons almost touching is good button design. (a) True (b) False
8. 8.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 48 px tall
   Done button: 60 px tall
   Cancel button: 40 px tall
   Save button: 44 px tall
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Done button: 52 px tall
    Back button: 52 px tall (a) Back (b) Done (c) Next
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Save button: 56 px tall
    Cancel button: 32 px tall
    Send button: 68 px tall (a) Cancel (b) Save (c) Send (d) Done
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Send button: 32 px tall
    Done button: 56 px tall (a) Next (b) Done (c) Send
13. 13.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) black on yellow (d) dark blue on black
14. 14.True or false: a tiny 20 px button is good button design. (a) False (b) True
15. 15.True or false: grey text on grey is poor button design. (a) False (b) True
16. 16.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
17. 17.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Back button: 40 px tall
    Save button: 44 px tall
    Cancel button: 64 px tall
19. 19.True or false: buttons almost touching is poor button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Save button: 60 px tall
    Cancel button: 68 px tall (a) Cancel (b) Save (c) Send
21. 21.Which colour pair is hard to read? (a) white on black (b) red on green (c) white on dark green (d) black on yellow
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Save button: 64 px tall
    Help button: 32 px tall (a) Save (b) Help (c) Done
23. 23.True or false: a big, easy tap area is poor button design. (a) True (b) False
24. 24.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Done button: 40 px tall
    Start button: 68 px tall (a) Done (b) Start (c) Back
26. 26.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
27. 27.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) white on dark green (d) light grey on white
29. 29.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Cancel button: 64 px tall
    Help button: 60 px tall
    Back button: 48 px tall (a) Cancel (b) Done (c) Back (d) Help
31. 31.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) pale pink on white (d) dark blue on black
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
33. 33.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) white on dark green (d) black on pale grey
34. 34.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Send button: 44 px tall
    Help button: 64 px tall
    Done button: 52 px tall
36. 36.Which colour pair is hard to read? (a) black on yellow (b) pale pink on white (c) black on pale grey (d) white on dark green
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Send button: 64 px tall
    Save button: 24 px tall
    Cancel button: 48 px tall (a) Cancel (b) Save (c) Next (d) Send
38. 38.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.True or false: a clear word like Save is good button design. (a) False (b) True
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Back button: 52 px tall
    Done button: 56 px tall

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