App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 391 · 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. The Cancel button is 44 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Save 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.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 68 px tall
   Done button: 60 px tall
   Save button: 36 px tall
   Next button: 52 px tall (a) Save (b) Next (c) Cancel (d) Done
6. 6.Which colour pair is hard to read? (a) dark blue on white (b) dark blue on black (c) black on pale grey (d) black on yellow
7. 7.True or false: strong colour contrast is poor button design. (a) False (b) True
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 36 px tall
   Start button: 48 px tall
   Cancel button: 56 px tall
   Send button: 64 px tall (a) Send (b) Cancel (c) Done (d) Start
9. 9.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
10. 10.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Save button: 48 px tall
    Back button: 36 px tall
    Help button: 40 px tall
13. 13.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.True or false: icons with no meaning is poor button design. (a) False (b) True
15. 15.True or false: icons with no meaning is good button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
18. 18.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Start button: 64 px tall
    Back button: 32 px tall (a) Start (b) Back (c) Done
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Back button: 48 px tall
    Help button: 52 px tall
    Next button: 44 px tall
22. 22.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.True or false: a big, easy tap area is good button design. (a) True (b) False
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Next button: 24 px tall
    Help button: 72 px tall
    Save button: 68 px tall (a) Help (b) Save (c) Next (d) Send
25. 25.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) yellow on white (d) dark blue on black
26. 26.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) yellow 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?
    Send button: 64 px tall
    Cancel button: 64 px tall
    Save button: 60 px tall
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 32 px tall
    Send button: 52 px tall
    Save button: 64 px tall
    Back button: 64 px tall (a) Back (b) Send (c) Start (d) Save
30. 30.True or false: strong colour contrast is good button design. (a) False (b) True
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
35. 35.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) pale pink on white (d) black on pale grey
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Done button: 60 px tall
    Next button: 32 px tall
    Cancel button: 44 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
39. 39.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?

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