App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 637 · 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 this good or poor button design: buttons almost touching? (a) poor design (b) good design
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 32 px tall
   Send button: 60 px tall
   Start button: 44 px tall
3. 3.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 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?
   Start button: 60 px tall
   Save button: 32 px tall
   Back button: 52 px tall
6. 6.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
7. 7.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) black on yellow (d) red on green
8. 8.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) red on green (d) black on pale grey
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Save button: 60 px tall
    Back button: 64 px tall
11. 11.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
12. 12.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Back button: 44 px tall
    Cancel button: 56 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 36 px tall
    Save button: 56 px tall
    Next button: 48 px tall (a) Start (b) Next (c) Save
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Done button: 72 px tall
    Back button: 52 px tall
    Save button: 28 px tall (a) Done (b) Cancel (c) Save (d) Back
17. 17.🌗 Is dark blue 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. Which button is too small?
    Next button: 48 px tall
    Save button: 56 px tall
    Send button: 64 px tall
    Back button: 24 px tall (a) Back (b) Save (c) Next (d) Send
19. 19.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
20. 20.True or false: a clear word like Save is good button design. (a) True (b) False
21. 21.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
22. 22.True or false: space between buttons is good button design. (a) False (b) True
23. 23.True or false: a big, easy tap area is poor button design. (a) True (b) False
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Help button: 60 px tall
    Next button: 64 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Next button: 52 px tall
    Done button: 64 px tall
    Save button: 40 px tall (a) Help (b) Done (c) Next (d) Save
27. 27.Which colour pair is hard to read? (a) dark blue on black (b) white on black (c) dark blue on white (d) black on pale grey
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Save button: 36 px tall
    Next button: 40 px tall
29. 29.True or false: strong colour contrast is poor button design. (a) False (b) True
30. 30.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) red on green (d) dark blue on black
31. 31.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) dark blue on black (d) white on black
32. 32.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Help button: 48 px tall
    Save button: 52 px tall (a) Save (b) Cancel (c) Help
34. 34.True or false: space between buttons is poor button design. (a) False (b) True
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Cancel button: 48 px tall
    Help button: 72 px tall
    Back button: 56 px tall (a) Help (b) Next (c) Back (d) Cancel
36. 36.True or false: grey text on grey is good button design. (a) False (b) True
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Help button: 24 px tall
    Back button: 68 px tall
    Cancel button: 68 px tall (a) Help (b) Done (c) Cancel (d) Back
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Start button: 56 px tall
    Save button: 32 px tall
39. 39.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) dark blue on white (d) pale pink on white
40. 40.True or false: icons with no meaning is good button design. (a) False (b) True

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