App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 667 · 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. Which button is too small?
   Done button: 40 px tall
   Cancel button: 56 px tall
   Start button: 48 px tall (a) Done (b) Start (c) Cancel
2. 2.True or false: grey text on grey is poor button design. (a) False (b) True
3. 3.True or false: icons with no meaning is poor button design. (a) True (b) False
4. 4.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 64 px tall
   Start button: 32 px tall
   Cancel button: 44 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
8. 8.True or false: a big, easy tap area is poor button design. (a) False (b) True
9. 9.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) dark blue on black (d) pale pink on white
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Save button: 56 px tall
    Back button: 32 px tall
    Start button: 60 px tall (a) Save (b) Start (c) Cancel (d) Back
11. 11.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) red on green (d) black on yellow
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Back button: 36 px tall
    Next button: 56 px tall
13. 13.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Send button: 24 px tall
    Help button: 52 px tall (a) Send (b) Help (c) Cancel
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Cancel button: 44 px tall
    Done button: 40 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
17. 17.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) dark blue on white (d) yellow on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Done button: 56 px tall
    Next button: 48 px tall
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
22. 22.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) white on dark green (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: 40 px tall
    Next button: 36 px tall
    Help button: 32 px tall
    Cancel button: 32 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Help button: 40 px tall
    Next button: 48 px tall
    Start button: 60 px tall (a) Start (b) Help (c) Back (d) Next
25. 25.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.Which colour pair is easy to read? (a) black on pale grey (b) yellow on white (c) red on green (d) dark blue on black
27. 27.True or false: grey text on grey is good button design. (a) True (b) False
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Done button: 52 px tall
    Save button: 64 px tall
    Start button: 64 px tall (a) Start (b) Save (c) Done (d) Help
29. 29.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Back button: 40 px tall
    Start button: 52 px tall
31. 31.True or false: icons with no meaning is good button design. (a) True (b) False
32. 32.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) dark blue on black (d) black on yellow
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Help button: 56 px tall
    Back button: 60 px tall
    Send button: 72 px tall (a) Send (b) Help (c) Done (d) Back
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Save button: 32 px tall
    Back button: 56 px tall (a) Back (b) Next (c) Save
35. 35.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
36. 36.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
37. 37.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Send button: 56 px tall
    Save button: 48 px tall (a) Save (b) Send (c) Cancel
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Save button: 48 px tall
    Start button: 64 px tall (a) Start (b) Done (c) Save

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