App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 626 · 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 72 px tall
   Cancel button: 24 px tall
   Start button: 68 px tall (a) Cancel (b) Done (c) Start
2. 2.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.Which colour pair is easy to read? (a) black on yellow (b) dark blue on black (c) yellow on white (d) red on green
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
5. 5.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) black on yellow (d) light grey on white
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 52 px tall
   Start button: 28 px tall
   Done button: 48 px tall (a) Start (b) Cancel (c) Done
8. 8.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
9. 9.True or false: grey text on grey is good button design. (a) True (b) False
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Done button: 44 px tall
    Start button: 64 px tall
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Save button: 48 px tall
    Cancel button: 32 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
13. 13.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Send button: 48 px tall
    Help button: 56 px tall
    Start button: 64 px tall
15. 15.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
16. 16.Which colour pair is hard to read? (a) dark blue on black (b) black on yellow (c) white on black (d) dark blue on white
17. 17.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
18. 18.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
20. 20.True or false: space between buttons is poor button design. (a) False (b) True
21. 21.True or false: a tiny 20 px button is good button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Save button: 48 px tall
    Start button: 52 px tall
    Help button: 40 px tall (a) Start (b) Save (c) Done (d) Help
23. 23.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.True or false: a clear word like Save is good button design. (a) True (b) False
26. 26.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
27. 27.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) red on green (d) black on pale grey
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Save button: 32 px tall
    Start button: 36 px tall
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Cancel button: 60 px tall
    Back button: 28 px tall (a) Back (b) Send (c) Cancel
30. 30.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) red on green (d) dark blue on white
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Next button: 44 px tall
    Send button: 32 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Send button: 40 px tall
    Help button: 56 px tall (a) Help (b) Done (c) Send
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
35. 35.True or false: grey text on grey is poor button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
37. 37.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) white on dark green (d) red on green
38. 38.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Save button: 68 px tall
    Next button: 60 px tall
    Done button: 32 px tall (a) Send (b) Save (c) Done (d) Next
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Save button: 64 px tall
    Back button: 32 px tall

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