App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 197 · 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.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 52 px tall
   Back button: 48 px tall
   Save button: 40 px tall
   Done button: 36 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
3. 3.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
4. 4.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.True or false: icons with no meaning is poor button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
7. 7.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.Which colour pair is hard to read? (a) dark blue on white (b) pale pink on white (c) white on dark green (d) black on pale grey
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 64 px tall
   Back button: 40 px tall
   Cancel button: 56 px tall (a) Done (b) Cancel (c) Back
10. 10.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Back button: 60 px tall
    Cancel button: 52 px tall (a) Cancel (b) Back (c) Done
12. 12.True or false: a big, easy tap area is poor button design. (a) False (b) True
13. 13.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.True or false: grey text on grey is good button design. (a) False (b) True
15. 15.True or false: a tiny 20 px button is good button design. (a) True (b) False
16. 16.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) black on yellow (d) dark blue on white
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Cancel button: 44 px tall
    Send button: 48 px tall (a) Cancel (b) Send (c) Done
18. 18.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
19. 19.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
21. 21.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
22. 22.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) red on green (d) black on yellow
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Save button: 68 px tall
    Start button: 56 px tall
    Next button: 48 px tall (a) Save (b) Send (c) Start (d) Next
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
26. 26.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) red on green (d) dark blue on black
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Help button: 32 px tall
    Cancel button: 60 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Cancel button: 52 px tall
    Start button: 40 px tall (a) Next (b) Start (c) Cancel
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
31. 31.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
32. 32.True or false: icons with no meaning is good button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Save button: 28 px tall
    Start button: 64 px tall (a) Start (b) Cancel (c) Save
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Help button: 52 px tall
    Done button: 44 px tall
    Next button: 56 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Save button: 60 px tall
    Send button: 32 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
39. 39.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 32 px tall
    Help button: 60 px tall
    Send button: 64 px tall
    Next button: 52 px tall (a) Next (b) Help (c) Send (d) Start

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