App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 243 · 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 this good or poor button design: a clear word like Save? (a) poor design (b) good design
2. 2.True or false: icons with no meaning is good button design. (a) False (b) True
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 68 px tall
   Start button: 72 px tall
   Next button: 56 px tall
   Done button: 36 px tall (a) Start (b) Next (c) Cancel (d) Done
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 64 px tall
   Next button: 36 px tall
   Cancel button: 48 px tall
   Done button: 60 px tall
6. 6.True or false: a clear word like Save is good button design. (a) False (b) True
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 48 px tall
   Cancel button: 72 px tall
   Start button: 60 px tall
   Done button: 24 px tall (a) Done (b) Cancel (c) Help (d) Start
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. Which button is too small?
   Done button: 64 px tall
   Next button: 28 px tall
   Send button: 64 px tall (a) Next (b) Done (c) Send
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Done button: 28 px tall
    Start button: 48 px tall
    Next button: 56 px tall (a) Done (b) Cancel (c) Next (d) Start
11. 11.True or false: a clear word like Save is poor button design. (a) False (b) True
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Start button: 40 px tall
    Help button: 64 px tall
    Send button: 64 px tall
13. 13.True or false: space between buttons is poor button design. (a) True (b) False
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
16. 16.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
17. 17.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
19. 19.🌗 Is pale pink on white 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. How many of these buttons follow the rule?
    Help button: 64 px tall
    Back button: 44 px tall
    Done button: 36 px tall
    Cancel button: 36 px tall
21. 21.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) red on green (d) black on pale grey
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Save button: 56 px tall
    Back button: 60 px tall
23. 23.🌗 Is red on green 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 20 px tall. How many px taller must it be?
25. 25.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
26. 26.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.Which colour pair is hard to read? (a) dark blue on white (b) pale pink on white (c) white on black (d) black on yellow
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Help button: 36 px tall
    Start button: 48 px tall (a) Help (b) Send (c) Start
29. 29.Which colour pair is easy to read? (a) pale pink on white (b) black on pale grey (c) light grey on white (d) red on green
30. 30.True or false: strong colour contrast is poor button design. (a) False (b) True
31. 31.True or false: a tiny 20 px button is poor button design. (a) True (b) False
32. 32.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) light grey on white (d) dark blue on white
33. 33.True or false: icons with no meaning is poor button design. (a) False (b) True
34. 34.True or false: grey text on grey is poor button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Send button: 24 px tall
    Help button: 68 px tall (a) Send (b) Next (c) Help
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Save button: 52 px tall
    Send button: 32 px tall
    Help button: 52 px tall (a) Send (b) Save (c) Cancel (d) Help
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Start button: 52 px tall
    Save button: 48 px tall
    Back button: 64 px tall (a) Back (b) Start (c) Next (d) Save
38. 38.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on dark green (d) pale pink on white
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
40. 40.True or false: strong colour contrast is good button design. (a) False (b) True

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