App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 180 · 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 good button design. (a) True (b) False
2. 2.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
4. 4.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 40 px tall
   Send button: 56 px tall
   Done button: 64 px tall
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 56 px tall
   Send button: 64 px tall
   Cancel button: 40 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 48 px tall
   Done button: 56 px tall
   Help button: 40 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 44 px tall
   Back button: 56 px tall
   Send button: 36 px tall
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Cancel button: 68 px tall
    Done button: 56 px tall (a) Cancel (b) Next (c) Done
11. 11.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) white on dark green (d) dark blue on black
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Save button: 44 px tall
    Done button: 40 px tall
13. 13.True or false: strong colour contrast is good button design. (a) True (b) False
14. 14.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) dark blue on black (d) black on yellow
15. 15.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
16. 16.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
17. 17.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Done button: 72 px tall
    Send button: 24 px tall
    Save button: 56 px tall (a) Send (b) Save (c) Done (d) Next
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Cancel button: 56 px tall
    Send button: 48 px tall
    Back button: 52 px tall
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Send button: 40 px tall
    Help button: 56 px tall
    Save button: 32 px tall
21. 21.True or false: buttons almost touching is good button design. (a) True (b) False
22. 22.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
23. 23.True or false: a tiny 20 px button is good button design. (a) False (b) True
24. 24.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Save button: 32 px tall
    Back button: 48 px tall
    Help button: 68 px tall (a) Help (b) Cancel (c) Save (d) Back
27. 27.Which colour pair is hard to read? (a) yellow on white (b) white on dark green (c) black on pale grey (d) white on black
28. 28.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) white on dark green (d) light grey on white
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Save button: 32 px tall
    Next button: 36 px tall
30. 30.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Help button: 64 px tall
    Back button: 32 px tall
    Next button: 56 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Send button: 60 px tall
    Help button: 36 px tall (a) Next (b) Send (c) Help
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Next button: 32 px tall
    Start button: 36 px tall
34. 34.True or false: a big, easy tap area is poor button design. (a) False (b) True
35. 35.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) white on black (d) red on green
36. 36.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.Which colour pair is easy to read? (a) yellow on white (b) black on pale grey (c) pale pink on white (d) light grey on white
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 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?
    Next button: 64 px tall
    Done button: 28 px tall
    Cancel button: 52 px tall
    Start button: 52 px tall (a) Cancel (b) Start (c) Next (d) Done
40. 40.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read

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