App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 219 · 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.True or false: a clear word like Save is poor button design. (a) False (b) True
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 64 px tall
   Save button: 52 px tall
   Next button: 28 px tall (a) Save (b) Send (c) Next
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
5. 5.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
7. 7.True or false: a tiny 20 px button is poor button design. (a) False (b) True
8. 8.🌗 Is dark blue on black 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. The Next button is 40 px tall. How many px taller must it be?
10. 10.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
11. 11.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.Which colour pair is hard to read? (a) dark blue on white (b) red on green (c) white on dark green (d) white on black
13. 13.True or false: space between buttons 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?
    Done button: 44 px tall
    Save button: 60 px tall
    Start button: 52 px tall
    Help button: 40 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Cancel button: 40 px tall
    Start button: 40 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
17. 17.True or false: grey text on grey is poor button design. (a) False (b) True
18. 18.Which colour pair is easy to read? (a) dark blue on black (b) black on pale grey (c) pale pink on white (d) yellow on white
19. 19.🌗 Is yellow on white 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. The Save button is 44 px tall. How many px taller must it be?
21. 21.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
22. 22.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
24. 24.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) light grey on white (d) black on pale grey
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Next button: 72 px tall
    Start button: 24 px tall
    Save button: 52 px tall (a) Cancel (b) Save (c) Start (d) Next
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Back button: 44 px tall
    Next button: 36 px tall
27. 27.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
28. 28.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.True or false: strong colour contrast is poor button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Done button: 56 px tall
    Send button: 56 px tall
    Back button: 72 px tall (a) Cancel (b) Done (c) Send (d) Back
31. 31.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Send button: 48 px tall
    Save button: 48 px tall (a) Cancel (b) Send (c) Save
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
34. 34.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) white on dark green (d) yellow on white
35. 35.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Cancel button: 36 px tall
    Save button: 60 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Next button: 52 px tall
    Back button: 72 px tall
    Start button: 48 px tall (a) Start (b) Next (c) Back (d) Done
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Back button: 40 px tall
    Save button: 56 px tall
39. 39.🌗 Is black on yellow 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. The Send button is 40 px tall. How many px taller must it be?

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