App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 296 · 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 red on green easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.True or false: buttons almost touching is good button design. (a) False (b) True
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 60 px tall
   Help button: 56 px tall
   Send button: 48 px tall
   Back button: 40 px tall (a) Start (b) Help (c) Send (d) Back
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 36 px tall
   Cancel button: 40 px tall
   Done button: 56 px tall
   Save button: 36 px tall
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
7. 7.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) black on yellow (d) red on green
8. 8.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
9. 9.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
10. 10.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on dark green (d) dark blue on black
11. 11.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.True or false: grey text on grey is poor button design. (a) True (b) False
13. 13.Which colour pair is hard to read? (a) white on dark green (b) light grey on white (c) dark blue on white (d) black on pale grey
14. 14.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Start button: 44 px tall
    Save button: 60 px tall
    Cancel button: 60 px tall (a) Save (b) Cancel (c) Send (d) Start
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Cancel button: 40 px tall
    Start button: 60 px tall
    Back button: 40 px tall
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Start button: 52 px tall
    Help button: 48 px tall
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Next button: 72 px tall
    Send button: 24 px tall
    Save button: 52 px tall (a) Next (b) Send (c) Save (d) Done
22. 22.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
24. 24.True or false: a tiny 20 px button is good button design. (a) True (b) False
25. 25.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.True or false: strong colour contrast is poor button design. (a) True (b) False
27. 27.True or false: a clear word like Save is good button design. (a) False (b) True
28. 28.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Cancel button: 52 px tall
    Done button: 48 px tall (a) Done (b) Cancel (c) Send
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Done button: 60 px tall
    Next button: 32 px tall
    Save button: 56 px tall (a) Save (b) Next (c) Cancel (d) Done
32. 32.Which colour pair is easy to read? (a) light grey on white (b) black on pale grey (c) yellow on white (d) pale pink on white
33. 33.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
34. 34.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on white (d) red on green
35. 35.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Send button: 36 px tall
    Back button: 48 px tall (a) Save (b) Send (c) Back
37. 37.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) white on black (d) black on yellow
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
40. 40.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design

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