App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 496 · 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.Which colour pair is easy to read? (a) white on black (b) red on green (c) dark blue on black (d) light grey on white
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
3. 3.True or false: a clear word like Save is poor button design. (a) True (b) False
4. 4.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.Which colour pair is easy to read? (a) black on yellow (b) red on green (c) light grey on white (d) yellow on white
6. 6.Which colour pair is hard to read? (a) pale pink on white (b) white on black (c) black on pale grey (d) dark blue on white
7. 7.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 72 px tall
   Help button: 40 px tall
   Send button: 60 px tall (a) Help (b) Next (c) Send
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 48 px tall
   Back button: 44 px tall
   Start button: 52 px tall
   Save button: 52 px tall
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
11. 11.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
13. 13.True or false: icons with no meaning is poor button design. (a) False (b) True
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Next button: 40 px tall
    Done button: 32 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Next button: 60 px tall
    Cancel button: 32 px tall
    Done button: 48 px tall (a) Cancel (b) Done (c) Help (d) Next
17. 17.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
19. 19.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Next button: 36 px tall
    Done button: 52 px tall
    Start button: 32 px tall
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
23. 23.True or false: a tiny 20 px button is poor button design. (a) True (b) False
24. 24.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
25. 25.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) white on dark green (d) light grey on white
26. 26.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) yellow on white (d) dark blue on white
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Help button: 52 px tall
    Done button: 24 px tall (a) Back (b) Done (c) Help
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Help button: 56 px tall
    Done button: 72 px tall (a) Cancel (b) Done (c) Help
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
30. 30.True or false: grey text on grey is good button design. (a) True (b) False
31. 31.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.True or false: strong colour contrast is poor button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Start button: 48 px tall
    Save button: 68 px tall (a) Start (b) Send (c) Save
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Back button: 36 px tall
    Next button: 32 px tall
    Start button: 44 px tall
35. 35.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) dark blue on white (d) white on black
36. 36.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Cancel button: 32 px tall
    Done button: 52 px tall
    Start button: 40 px tall
38. 38.True or false: a big, easy tap area is poor button design. (a) False (b) True
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Back button: 36 px tall
    Cancel button: 36 px tall
    Next button: 44 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Send button: 40 px tall
    Save button: 52 px tall (a) Save (b) Send (c) Help

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