App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 368 · 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: grey text on grey is good button design. (a) True (b) False
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 40 px tall
   Save button: 48 px tall
   Start button: 52 px tall
   Cancel button: 60 px tall
3. 3.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 68 px tall
   Send button: 48 px tall
   Next button: 68 px tall
   Cancel button: 40 px tall (a) Back (b) Cancel (c) Send (d) Next
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 28 px tall
   Send button: 64 px tall
   Start button: 64 px tall (a) Send (b) Cancel (c) Start
6. 6.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.True or false: a tiny 20 px button is poor button design. (a) True (b) False
8. 8.True or false: strong colour contrast is poor button design. (a) False (b) True
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 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?
    Save button: 72 px tall
    Help button: 40 px tall
    Start button: 72 px tall (a) Save (b) Help (c) Start
11. 11.True or false: a clear word like Save is good button design. (a) False (b) True
12. 12.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) white on dark green (d) light grey on white
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Done button: 72 px tall
    Cancel button: 52 px tall (a) Start (b) Done (c) Cancel
14. 14.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) dark blue on black (d) white on black
15. 15.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
16. 16.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Done button: 60 px tall
    Help button: 44 px tall
    Next button: 52 px tall (a) Cancel (b) Help (c) Next (d) Done
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Send button: 60 px tall
    Start button: 60 px tall (a) Send (b) Save (c) Start
19. 19.True or false: icons with no meaning is poor button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
21. 21.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
24. 24.True or false: buttons almost touching is good button design. (a) True (b) False
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Done button: 48 px tall
    Cancel button: 48 px tall (a) Done (b) Send (c) Cancel
26. 26.True or false: a tiny 20 px button is good button design. (a) False (b) True
27. 27.True or false: strong colour contrast is good button design. (a) True (b) False
28. 28.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) yellow on white (d) dark blue on white
29. 29.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Back button: 44 px tall
    Done button: 68 px tall (a) Cancel (b) Done (c) Back
31. 31.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Start button: 52 px tall
    Cancel button: 48 px tall
    Next button: 44 px tall (a) Cancel (b) Start (c) Next (d) Save
33. 33.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) light grey on white (d) white on black
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Back button: 56 px tall
    Done button: 36 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
36. 36.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
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.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
39. 39.Which colour pair is hard to read? (a) black on yellow (b) yellow on white (c) black on pale grey (d) white on dark green
40. 40.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design

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