App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 143 · 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 white on black easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 48 px tall
   Back button: 40 px tall
   Start button: 60 px tall (a) Back (b) Start (c) Help
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 52 px tall
   Start button: 56 px tall
   Back button: 24 px tall
   Send button: 64 px tall (a) Send (b) Start (c) Next (d) Back
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
6. 6.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
7. 7.True or false: a clear word like Save is good button design. (a) True (b) False
8. 8.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) black on yellow (d) yellow on white
11. 11.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
12. 12.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
13. 13.True or false: strong colour contrast is good button design. (a) True (b) False
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Help button: 60 px tall
    Save button: 48 px tall
    Send button: 56 px tall (a) Done (b) Save (c) Help (d) Send
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Back button: 24 px tall
    Done button: 64 px tall
    Cancel button: 72 px tall (a) Done (b) Cancel (c) Save (d) Back
16. 16.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
17. 17.Which colour pair is hard to read? (a) yellow on white (b) dark blue on white (c) white on black (d) black on yellow
18. 18.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Save button: 64 px tall
    Start button: 68 px tall
    Done button: 28 px tall (a) Start (b) Done (c) Back (d) Save
20. 20.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.True or false: a big, easy tap area is good button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Cancel button: 56 px tall
    Help button: 48 px tall (a) Help (b) Send (c) Cancel
23. 23.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 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?
    Next button: 40 px tall
    Send button: 52 px tall
    Start button: 48 px tall
26. 26.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) white on black (d) red on green
27. 27.Which colour pair is easy to read? (a) white on dark green (b) dark blue on black (c) red on green (d) light grey on white
28. 28.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.True or false: a big, easy tap area is poor button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
32. 32.True or false: space between buttons is poor button design. (a) False (b) True
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Done button: 24 px tall
    Help button: 72 px tall
    Send button: 48 px tall (a) Help (b) Send (c) Done (d) Next
34. 34.🌗 Is black on yellow 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. Which button is too small?
    Save button: 28 px tall
    Back button: 68 px tall
    Done button: 72 px tall
    Next button: 48 px tall (a) Back (b) Save (c) Next (d) Done
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
37. 37.🌗 Is black on pale grey 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?
    Save button: 32 px tall
    Cancel button: 40 px tall
    Send button: 32 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Back button: 32 px tall
    Help button: 56 px tall
    Send button: 52 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Help button: 60 px tall
    Next button: 68 px tall (a) Next (b) Help (c) Send

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