App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 364 · 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 good button design. (a) True (b) False
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 60 px tall
   Save button: 52 px tall
   Send button: 56 px tall
   Next button: 36 px tall (a) Send (b) Save (c) Next (d) Done
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?
   Cancel button: 60 px tall
   Start button: 60 px tall
   Send button: 56 px tall
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
7. 7.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) white on dark green (d) light grey on white
8. 8.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 40 px tall
   Save button: 40 px tall
   Back button: 32 px tall
10. 10.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) yellow on white (d) black on pale grey
11. 11.🌗 Is black on pale grey 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. Which button is too small?
    Send button: 28 px tall
    Back button: 48 px tall
    Save button: 52 px tall (a) Back (b) Save (c) Send
13. 13.True or false: space between buttons is poor button design. (a) False (b) True
14. 14.True or false: a tiny 20 px button is poor button design. (a) False (b) True
15. 15.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
16. 16.True or false: space between buttons is good button design. (a) False (b) True
17. 17.True or false: buttons almost touching is good button design. (a) True (b) False
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Start button: 24 px tall
    Send button: 56 px tall (a) Send (b) Save (c) Start
19. 19.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) white on dark green (d) black on yellow
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Save button: 60 px tall
    Back button: 32 px tall
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Help button: 24 px tall
    Save button: 56 px tall
    Back button: 56 px tall (a) Back (b) Save (c) Help (d) Send
22. 22.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) dark blue on white (d) pale pink on white
23. 23.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
24. 24.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Help button: 36 px tall
    Send button: 64 px tall
    Back button: 48 px tall (a) Help (b) Next (c) Send (d) Back
27. 27.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) black on pale grey (d) yellow on white
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Send button: 24 px tall
    Help button: 48 px tall (a) Help (b) Start (c) Send
29. 29.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Help button: 36 px tall
    Send button: 64 px tall
    Back button: 48 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Save button: 36 px tall
    Back button: 56 px tall
    Send button: 44 px tall
32. 32.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Next button: 32 px tall
    Send button: 32 px tall
    Start button: 40 px tall
34. 34.True or false: icons with no meaning is good button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
36. 36.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Start button: 32 px tall
    Back button: 36 px tall
    Done button: 44 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
39. 39.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
40. 40.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design

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