App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 228 · 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 52 px tall
   Back button: 32 px tall
   Next button: 48 px tall (a) Back (b) Next (c) Save
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 36 px tall
   Help button: 52 px tall
   Next button: 48 px tall
   Cancel button: 32 px tall
4. 4.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 68 px tall
   Send button: 32 px tall
   Cancel button: 72 px tall
   Start button: 68 px tall (a) Send (b) Start (c) Cancel (d) Done
7. 7.True or false: icons with no meaning is good button design. (a) True (b) False
8. 8.True or false: a clear word like Save is poor button design. (a) False (b) True
9. 9.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
10. 10.True or false: space between buttons is good button design. (a) True (b) False
11. 11.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Help button: 64 px tall
    Cancel button: 32 px tall (a) Done (b) Cancel (c) Help
13. 13.Which colour pair is hard to read? (a) white on black (b) dark blue on black (c) black on pale grey (d) white on dark green
14. 14.True or false: a big, easy tap area is poor button design. (a) True (b) False
15. 15.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
16. 16.True or false: grey text on grey is poor button design. (a) False (b) True
17. 17.🌗 Is yellow on white 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. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Help button: 40 px tall
    Save button: 32 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Done button: 52 px tall
    Start button: 24 px tall
    Next button: 72 px tall (a) Next (b) Cancel (c) Done (d) Start
20. 20.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on white (c) light grey on white (d) yellow on white
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Send button: 24 px tall
    Next button: 68 px tall (a) Cancel (b) Send (c) Next
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. How many of these buttons follow the rule?
    Send button: 52 px tall
    Back button: 56 px tall
    Start button: 52 px tall
    Next button: 56 px tall
25. 25.True or false: grey text on grey is good 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?
    Save button: 56 px tall
    Start button: 32 px tall
    Done button: 60 px tall
27. 27.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
29. 29.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on yellow (d) red on green
30. 30.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
31. 31.True or false: a clear word like Save is good button design. (a) True (b) False
32. 32.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) dark blue on black (d) white on dark green
33. 33.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) yellow on white (d) black on pale grey
34. 34.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) red on green (d) white on black
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Done button: 60 px tall
    Start button: 40 px tall
    Cancel button: 64 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Save button: 40 px tall
    Send button: 52 px tall
    Start button: 52 px tall (a) Send (b) Start (c) Cancel (d) Save
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Help button: 60 px tall
    Next button: 48 px tall
    Back button: 60 px tall (a) Save (b) Back (c) Next (d) Help
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Help button: 32 px tall
    Cancel button: 36 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Cancel button: 48 px tall
    Next button: 28 px tall
    Help button: 60 px tall (a) Next (b) Cancel (c) Start (d) Help

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