App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 385 · 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: grey text on grey is poor button design. (a) False (b) True
2. 2.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
4. 4.Which colour pair is easy to read? (a) white on dark green (b) dark blue on black (c) light grey on white (d) pale pink on white
5. 5.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
6. 6.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 68 px tall
   Start button: 60 px tall
   Help button: 72 px tall
   Cancel button: 44 px tall (a) Start (b) Done (c) Help (d) Cancel
8. 8.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Cancel button: 68 px tall
    Save button: 32 px tall
    Next button: 48 px tall (a) Save (b) Start (c) Cancel (d) Next
11. 11.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) dark blue on black (d) light grey on white
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Back button: 60 px tall
    Done button: 44 px tall
    Next button: 60 px tall
13. 13.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
14. 14.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Back button: 48 px tall
    Send button: 52 px tall
    Save button: 36 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Back button: 64 px tall
    Done button: 24 px tall (a) Start (b) Back (c) Done
18. 18.True or false: a big, easy tap area is poor button design. (a) True (b) False
19. 19.True or false: buttons almost touching is good button design. (a) True (b) False
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Done button: 64 px tall
    Help button: 32 px tall (a) Start (b) Done (c) Help
21. 21.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Save button: 24 px tall
    Send button: 68 px tall (a) Send (b) Cancel (c) Save
23. 23.Which colour pair is hard to read? (a) red on green (b) dark blue on white (c) black on pale grey (d) black on yellow
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 32 px tall
    Cancel button: 48 px tall
    Back button: 60 px tall (a) Cancel (b) Back (c) Start
25. 25.True or false: space between buttons is good button design. (a) False (b) True
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Next button: 68 px tall
    Back button: 24 px tall (a) Help (b) Next (c) Back
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Next button: 48 px tall
    Save button: 44 px tall
28. 28.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) dark blue on white (d) dark blue on black
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. The Back button is 44 px tall. How many px taller must it be?
31. 31.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Save button: 68 px tall
    Back button: 44 px tall (a) Next (b) Back (c) Save
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Help button: 32 px tall
    Save button: 52 px tall
    Cancel button: 60 px tall
34. 34.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Back button: 56 px tall
    Send button: 56 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Start button: 40 px tall
    Back button: 44 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
40. 40.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read

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