App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 57 · 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: icons with no meaning is good button design. (a) False (b) True
2. 2.True or false: space between buttons is good button design. (a) True (b) False
3. 3.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
4. 4.True or false: a tiny 20 px button is good button design. (a) False (b) True
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 28 px tall
   Help button: 52 px tall
   Next button: 68 px tall
   Save button: 72 px tall (a) Help (b) Next (c) Save (d) Back
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
7. 7.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
8. 8.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) light grey on white (d) black on yellow
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 24 px tall
   Send button: 68 px tall
   Save button: 52 px tall (a) Send (b) Back (c) Save
10. 10.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Help button: 48 px tall
    Cancel button: 24 px tall
    Start button: 56 px tall (a) Help (b) Start (c) Done (d) Cancel
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Help button: 32 px tall
    Back button: 72 px tall (a) Done (b) Help (c) Back
13. 13.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) black on yellow (d) red on green
14. 14.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.True or false: a tiny 20 px button is poor button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
17. 17.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) red on green (d) white on black
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Done button: 40 px tall
    Help button: 60 px tall
    Save button: 40 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
20. 20.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) yellow on white (d) white on dark green
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
22. 22.Which colour pair is easy to read? (a) dark blue on white (b) pale pink on white (c) red on green (d) dark blue on black
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Cancel button: 32 px tall
    Back button: 60 px tall
    Next button: 48 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Send button: 56 px tall
    Help button: 52 px tall (a) Help (b) Done (c) Send
25. 25.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.🌗 Is dark blue 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) light grey on white (b) dark blue on white (c) black on pale grey (d) white on dark green
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Save button: 40 px tall
    Done button: 52 px tall
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Send button: 60 px tall
    Cancel button: 48 px tall (a) Done (b) Send (c) Cancel
30. 30.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
33. 33.True or false: grey text on grey is poor button design. (a) True (b) False
34. 34.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on pale grey (d) yellow on white
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
36. 36.True or false: grey text on grey is good button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Send button: 48 px tall
    Save button: 56 px tall (a) Start (b) Save (c) Send
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Done button: 64 px tall
    Cancel button: 48 px tall
    Next button: 48 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Help button: 52 px tall
    Start button: 48 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?

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