App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 630 · 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: space between buttons 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?
   Done button: 48 px tall
   Cancel button: 44 px tall
   Start button: 64 px tall
   Save button: 44 px tall
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
5. 5.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) red on green (d) white on black
6. 6.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) light grey on white (d) yellow on white
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 60 px tall
   Cancel button: 68 px tall
   Done button: 56 px tall
   Help button: 28 px tall (a) Send (b) Help (c) Done (d) Cancel
8. 8.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) red on green (d) white on dark green
10. 10.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) light grey on white (d) dark blue on white
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Done button: 28 px tall
    Next button: 48 px tall
    Start button: 56 px tall (a) Done (b) Next (c) Back (d) Start
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Save button: 24 px tall
    Cancel button: 72 px tall (a) Help (b) Cancel (c) Save
15. 15.Which colour pair is hard to read? (a) pale pink on white (b) white on dark green (c) dark blue on white (d) black on yellow
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
19. 19.True or false: a clear word like Save is good button design. (a) True (b) False
20. 20.True or false: buttons almost touching is good button design. (a) True (b) False
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Cancel button: 32 px tall
    Next button: 56 px tall (a) Next (b) Cancel (c) Back
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Cancel button: 72 px tall
    Send button: 60 px tall
    Save button: 40 px tall (a) Send (b) Cancel (c) Start (d) Save
24. 24.True or false: grey text on grey is good button design. (a) True (b) False
25. 25.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
27. 27.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) dark blue on black (d) red on green
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Done button: 32 px tall
    Start button: 56 px tall
29. 29.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) dark blue on white (d) dark blue on black
30. 30.True or false: strong colour contrast is poor button design. (a) True (b) False
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Done button: 64 px tall
    Save button: 40 px tall
    Cancel button: 72 px tall (a) Back (b) Save (c) Done (d) Cancel
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Send button: 44 px tall
    Done button: 44 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
34. 34.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) white on black (d) yellow on white
36. 36.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) white on dark green (d) pale pink on white
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Save button: 68 px tall
    Cancel button: 60 px tall (a) Save (b) Cancel (c) Start
38. 38.🌗 Is pale pink on white 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 Save button is 28 px tall. How many px taller must it be?
40. 40.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design

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