App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 498 · 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: a big, easy tap area is good button design. (a) False (b) True
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
3. 3.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
4. 4.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 44 px tall
   Start button: 44 px tall
   Save button: 48 px tall
   Help button: 64 px tall
7. 7.Which colour pair is hard to read? (a) white on black (b) light grey on white (c) black on yellow (d) white on dark green
8. 8.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 56 px tall
   Send button: 40 px tall
   Back button: 44 px tall
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Help button: 36 px tall
    Next button: 32 px tall
    Cancel button: 40 px tall
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Done button: 56 px tall
    Back button: 72 px tall
    Save button: 60 px tall (a) Done (b) Back (c) Cancel (d) Save
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Help button: 68 px tall
    Save button: 40 px tall (a) Done (b) Help (c) Save
15. 15.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) red on green (d) black on pale grey
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Start button: 60 px tall
    Cancel button: 48 px tall
    Back button: 44 px tall (a) Cancel (b) Start (c) Done (d) Back
18. 18.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) black on yellow (d) white on black
19. 19.True or false: grey text on grey is poor button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Next button: 72 px tall
    Done button: 68 px tall
    Save button: 56 px tall (a) Back (b) Done (c) Next (d) Save
21. 21.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
23. 23.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Next button: 36 px tall
    Cancel button: 48 px tall
26. 26.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) white on black (d) pale pink on white
27. 27.True or false: space between buttons is poor button design. (a) True (b) False
28. 28.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) white on dark green (d) red on green
29. 29.True or false: a clear word like Save is poor button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Done button: 64 px tall
    Cancel button: 28 px tall (a) Done (b) Send (c) Cancel
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
32. 32.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Help button: 72 px tall
    Back button: 36 px tall (a) Help (b) Back (c) Next
35. 35.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Start button: 60 px tall
    Save button: 56 px tall
    Next button: 32 px tall (a) Next (b) Start (c) Save (d) Help
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Next button: 24 px tall
    Start button: 48 px tall (a) Back (b) Next (c) Start
40. 40.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design

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