App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 213 · 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.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
2. 2.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 64 px tall
   Save button: 40 px tall
   Start button: 72 px tall
   Cancel button: 48 px tall (a) Start (b) Cancel (c) Save (d) Send
4. 4.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 32 px tall
   Start button: 36 px tall
   Done button: 44 px tall
   Help button: 64 px tall
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 40 px tall
   Save button: 40 px tall
   Next button: 36 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
8. 8.🌗 Is black on yellow 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 Send button is 40 px tall. How many px taller must it be?
10. 10.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) white on dark green (d) dark blue on black
11. 11.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Cancel button: 40 px tall
    Start button: 60 px tall
13. 13.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) white on black (d) red on green
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Save button: 56 px tall
    Start button: 36 px tall
    Done button: 40 px tall
15. 15.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) black on pale grey (d) white on black
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Send button: 52 px tall
    Cancel button: 48 px tall
    Done button: 52 px tall (a) Cancel (b) Send (c) Done (d) Next
17. 17.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Help button: 44 px tall
    Next button: 44 px tall
19. 19.True or false: space between buttons is poor button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Cancel button: 40 px tall
    Send button: 72 px tall (a) Back (b) Send (c) Cancel
21. 21.True or false: icons with no meaning is good button design. (a) False (b) True
22. 22.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
23. 23.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Done button: 60 px tall
    Save button: 52 px tall
    Next button: 60 px tall
26. 26.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
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: a tiny 20 px button is poor button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
31. 31.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
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Cancel button: 64 px tall
    Save button: 48 px tall
33. 33.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) dark blue on black (d) yellow on white
34. 34.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Save button: 44 px tall
    Send button: 52 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Next button: 48 px tall
    Save button: 64 px tall
    Done button: 68 px tall (a) Back (b) Save (c) Next (d) Done
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Send button: 48 px tall
    Done button: 60 px tall (a) Send (b) Done (c) Save
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?

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