App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 275 · 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.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 52 px tall
   Cancel button: 52 px tall
   Send button: 56 px tall
   Back button: 52 px tall
4. 4.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 64 px tall
   Start button: 52 px tall
   Save button: 48 px tall
   Next button: 28 px tall (a) Send (b) Start (c) Save (d) Next
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 36 px tall
   Start button: 52 px tall
   Send button: 56 px tall
   Cancel button: 40 px tall
7. 7.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.True or false: grey text on grey is good button design. (a) True (b) False
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 64 px tall
   Help button: 48 px tall
   Cancel button: 48 px tall
   Next button: 36 px tall (a) Cancel (b) Send (c) Help (d) Next
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Done button: 68 px tall
    Help button: 60 px tall (a) Help (b) Send (c) Done
11. 11.🌗 Is dark blue on white 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?
    Next button: 36 px tall
    Cancel button: 60 px tall
    Start button: 52 px tall
    Done button: 48 px tall (a) Done (b) Start (c) Next (d) Cancel
13. 13.True or false: space between buttons is good button design. (a) False (b) True
14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Back button: 60 px tall
    Next button: 28 px tall (a) Back (b) Next (c) Send
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Next button: 56 px tall
    Back button: 48 px tall
    Send button: 48 px tall
18. 18.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) black on pale grey (d) light grey on white
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Help button: 64 px tall
    Send button: 64 px tall (a) Send (b) Done (c) Help
20. 20.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on pale grey (d) dark blue on black
21. 21.True or false: a clear word like Save is poor button design. (a) True (b) False
22. 22.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) yellow on white (d) dark blue on white
23. 23.🌗 Is black on yellow 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. How many of these buttons follow the rule?
    Start button: 64 px tall
    Cancel button: 40 px tall
    Back button: 56 px tall
    Next button: 56 px tall
25. 25.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
26. 26.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
29. 29.True or false: strong colour contrast is good button design. (a) False (b) True
30. 30.True or false: space between buttons is poor button design. (a) False (b) True
31. 31.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
32. 32.Which colour pair is hard to read? (a) pale pink on white (b) white on dark green (c) dark blue on white (d) white on black
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Done button: 52 px tall
    Help button: 60 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Save button: 48 px tall
    Help button: 56 px tall (a) Help (b) Save (c) Cancel
36. 36.True or false: buttons almost touching is poor button design. (a) False (b) True
37. 37.🌗 Is white 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. Which button is too small?
    Done button: 68 px tall
    Start button: 28 px tall
    Next button: 72 px tall
    Save button: 64 px tall (a) Save (b) Next (c) Start (d) Done
39. 39.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
40. 40.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read

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