App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 259 · 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.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) white on dark green (d) white on black
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
3. 3.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) dark blue on black (d) white on dark green
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 52 px tall
   Send button: 36 px tall
   Back button: 56 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
6. 6.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.True or false: a big, easy tap area is good button design. (a) False (b) True
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 68 px tall
   Send button: 28 px tall
   Save button: 56 px tall
   Help button: 56 px tall (a) Next (b) Help (c) Send (d) Save
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
10. 10.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
13. 13.True or false: icons with no meaning is good button design. (a) True (b) False
14. 14.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.True or false: space between buttons is poor button design. (a) False (b) True
16. 16.True or false: a clear word like Save is poor button design. (a) True (b) False
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Back button: 44 px tall
    Save button: 60 px tall
    Done button: 40 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Done button: 40 px tall
    Cancel button: 32 px tall
    Help button: 56 px tall
19. 19.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
22. 22.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
23. 23.True or false: strong colour contrast is poor button design. (a) True (b) False
24. 24.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
25. 25.True or false: a tiny 20 px button is poor button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Help button: 44 px tall
    Save button: 44 px tall
    Start button: 48 px tall
27. 27.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Next button: 56 px tall
    Cancel button: 56 px tall (a) Next (b) Back (c) Cancel
29. 29.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
30. 30.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Send button: 64 px tall
    Save button: 48 px tall (a) Send (b) Done (c) Save
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Send button: 64 px tall
    Back button: 44 px tall (a) Send (b) Start (c) Back
33. 33.Which colour pair is hard to read? (a) white on black (b) yellow on white (c) black on pale grey (d) white on dark green
34. 34.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) red on green (d) black on yellow
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Back button: 56 px tall
    Start button: 60 px tall
    Send button: 48 px tall (a) Start (b) Done (c) Back (d) Send
37. 37.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Back button: 52 px tall
    Next button: 52 px tall
    Send button: 64 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Done button: 60 px tall
    Save button: 64 px tall
    Cancel button: 48 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?

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