App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 499 · 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?
   Save button: 36 px tall
   Cancel button: 36 px tall
   Next button: 64 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 44 px tall
   Next button: 36 px tall
   Cancel button: 52 px tall
   Back button: 52 px tall
3. 3.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
5. 5.True or false: space between buttons is good button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 48 px tall
   Back button: 44 px tall
   Help button: 64 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
8. 8.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) black on yellow (d) yellow on white
9. 9.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
10. 10.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
11. 11.Which colour pair is hard to read? (a) pale pink on white (b) black on yellow (c) white on dark green (d) black on pale grey
12. 12.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 36 px tall
    Cancel button: 48 px tall
    Done button: 52 px tall
    Back button: 60 px tall (a) Done (b) Back (c) Cancel (d) Help
14. 14.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on white (c) yellow on white (d) red on green
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
17. 17.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on white (d) yellow on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
19. 19.Which colour pair is easy to read? (a) white on black (b) pale pink on white (c) yellow on white (d) light grey on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Save button: 56 px tall
    Cancel button: 40 px tall
    Back button: 36 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Next button: 40 px tall
    Cancel button: 60 px tall
    Back button: 64 px tall (a) Save (b) Back (c) Cancel (d) Next
24. 24.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.True or false: strong colour contrast is poor button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Start button: 24 px tall
    Cancel button: 72 px tall (a) Cancel (b) Start (c) Help
27. 27.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) white on black (d) white on dark green
28. 28.True or false: a big, easy tap area is poor button design. (a) True (b) False
29. 29.True or false: grey text on grey is poor button design. (a) False (b) True
30. 30.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) red on green
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Send button: 72 px tall
    Done button: 24 px tall (a) Done (b) Cancel (c) Send
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Help button: 56 px tall
    Next button: 48 px tall
    Save button: 44 px tall (a) Save (b) Next (c) Start (d) Help
33. 33.True or false: a clear word like Save is good button design. (a) False (b) True
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
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.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
38. 38.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Send button: 72 px tall
    Save button: 72 px tall
    Next button: 36 px tall (a) Save (b) Start (c) Send (d) Next
40. 40.True or false: a clear word like Save is poor button design. (a) False (b) True

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