App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 201 · 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: buttons almost touching is poor button design. (a) False (b) True
2. 2.True or false: a clear word like Save is poor button design. (a) True (b) False
3. 3.Which colour pair is easy to read? (a) black on pale grey (b) red on green (c) dark blue on black (d) light grey on white
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
5. 5.True or false: grey text on grey is good button design. (a) True (b) False
6. 6.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on dark green (d) pale pink on white
7. 7.True or false: space between buttons is good button design. (a) True (b) False
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
9. 9.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) black on yellow (d) light grey on white
10. 10.True or false: grey text on grey is poor button design. (a) False (b) True
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Help button: 44 px tall
    Send button: 32 px tall
13. 13.True or false: strong colour contrast is good button design. (a) True (b) False
14. 14.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) pale pink on white (d) black on yellow
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Cancel button: 52 px tall
    Back button: 52 px tall
    Save button: 44 px tall (a) Cancel (b) Save (c) Start (d) Back
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Back button: 28 px tall
    Start button: 72 px tall (a) Start (b) Help (c) Back
17. 17.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Send button: 72 px tall
    Cancel button: 40 px tall
    Done button: 56 px tall (a) Done (b) Send (c) Cancel (d) Help
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Send button: 40 px tall
    Help button: 44 px tall
21. 21.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.True or false: a clear word like Save is good button design. (a) False (b) True
23. 23.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
25. 25.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Back button: 60 px tall
    Send button: 56 px tall
    Next button: 40 px tall
27. 27.True or false: a big, easy tap area is poor button design. (a) True (b) False
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Send button: 60 px tall
    Save button: 48 px tall
29. 29.Which colour pair is easy to read? (a) yellow on white (b) white on black (c) red on green (d) light grey on white
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Send button: 32 px tall
    Help button: 52 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Help button: 32 px tall
    Send button: 64 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Next button: 56 px tall
    Back button: 60 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Cancel button: 32 px tall
    Done button: 48 px tall
    Save button: 56 px tall
36. 36.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) pale pink on white (d) red on green
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Cancel button: 64 px tall
    Send button: 32 px tall (a) Cancel (b) Send (c) Back
38. 38.True or false: a big, easy tap area is good button design. (a) False (b) True
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Back button: 48 px tall
    Cancel button: 40 px tall
    Save button: 60 px tall (a) Cancel (b) Back (c) Save (d) Done
40. 40.Which colour pair is hard to read? (a) dark blue on black (b) white on dark green (c) white on black (d) black on pale grey

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