App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 628 · 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: space between buttons? (a) good design (b) poor design
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 68 px tall
   Help button: 72 px tall
   Start button: 36 px tall (a) Cancel (b) Start (c) Help
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 72 px tall
   Done button: 64 px tall
   Send button: 40 px tall
   Save button: 64 px tall (a) Send (b) Save (c) Back (d) Done
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
6. 6.Which colour pair is easy to read? (a) dark blue on black (b) white on dark green (c) pale pink on white (d) red on green
7. 7.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
8. 8.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 52 px tall
   Cancel button: 52 px tall
   Back button: 64 px tall
   Next button: 44 px tall
10. 10.True or false: strong colour contrast is good button design. (a) True (b) False
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
12. 12.True or false: a big, easy tap area is poor button design. (a) True (b) False
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
14. 14.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.True or false: grey text on grey is good button design. (a) False (b) True
16. 16.True or false: icons with no meaning is good button design. (a) True (b) False
17. 17.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Done button: 52 px tall
    Start button: 64 px tall
    Help button: 72 px tall (a) Start (b) Help (c) Done (d) Cancel
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
20. 20.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Help button: 40 px tall
    Next button: 64 px tall (a) Help (b) Next (c) Done
22. 22.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) light grey on white (d) black on yellow
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Back button: 48 px tall
    Start button: 60 px tall
24. 24.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) dark blue on white (d) red on green
25. 25.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Back button: 64 px tall
    Send button: 52 px tall
    Start button: 52 px tall
27. 27.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Done button: 40 px tall
    Send button: 32 px tall
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Help button: 64 px tall
    Send button: 36 px tall (a) Send (b) Cancel (c) Help
30. 30.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
31. 31.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) light grey on white (d) black on pale grey
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Start button: 44 px tall
    Done button: 60 px tall
    Help button: 68 px tall (a) Save (b) Help (c) Start (d) Done
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Next button: 40 px tall
    Cancel button: 52 px tall
    Send button: 32 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
35. 35.True or false: a tiny 20 px button is good button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Back button: 32 px tall
    Next button: 40 px tall
37. 37.True or false: buttons almost touching is good button design. (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Cancel button: 44 px tall
    Start button: 52 px tall
    Help button: 36 px tall
39. 39.True or false: space between buttons is good button design. (a) False (b) True
40. 40.True or false: a tiny 20 px button is poor button design. (a) False (b) True

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