App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 108 · 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 light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 60 px tall
   Cancel button: 24 px tall
   Send button: 60 px tall
   Help button: 60 px tall (a) Help (b) Cancel (c) Save (d) Send
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
4. 4.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 72 px tall
   Send button: 60 px tall
   Cancel button: 36 px tall (a) Cancel (b) Send (c) Done
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 52 px tall
   Help button: 32 px tall
   Cancel button: 32 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 32 px tall
   Back button: 48 px tall
   Save button: 48 px tall
   Send button: 32 px tall
8. 8.Which colour pair is hard to read? (a) black on pale grey (b) pale pink on white (c) black on yellow (d) dark blue on white
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 56 px tall
   Cancel button: 52 px tall
   Done button: 40 px tall (a) Done (b) Save (c) Cancel
10. 10.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) red on green (d) pale pink on white
11. 11.True or false: a clear word like Save is poor button design. (a) True (b) False
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Done button: 64 px tall
    Next button: 48 px tall
    Back button: 56 px tall
14. 14.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
15. 15.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
17. 17.True or false: buttons almost touching is good button design. (a) True (b) False
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Help button: 36 px tall
    Back button: 72 px tall
    Next button: 64 px tall (a) Help (b) Save (c) Back (d) Next
19. 19.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.True or false: a big, easy tap area is poor button design. (a) False (b) True
21. 21.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
22. 22.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
24. 24.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) black on yellow (d) dark blue on black
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Back button: 40 px tall
    Help button: 56 px tall
    Cancel button: 56 px tall (a) Back (b) Save (c) Cancel (d) Help
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Back button: 28 px tall
    Send button: 72 px tall (a) Send (b) Next (c) Back
27. 27.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
30. 30.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Save button: 28 px tall
    Start button: 72 px tall (a) Save (b) Start (c) Cancel
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Start button: 40 px tall
    Send button: 48 px tall
    Cancel button: 32 px tall
33. 33.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Start button: 64 px tall
    Done button: 52 px tall
    Back button: 68 px tall (a) Done (b) Cancel (c) Back (d) Start
35. 35.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) yellow on white (d) white on dark green
36. 36.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) white on dark green (d) white on black
37. 37.True or false: a tiny 20 px button is poor button design. (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Back button: 48 px tall
    Next button: 52 px tall
    Help button: 32 px tall
39. 39.Which colour pair is easy to read? (a) white on black (b) light grey on white (c) yellow on white (d) red on green
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Cancel button: 40 px tall
    Save button: 64 px tall (a) Cancel (b) Save (c) Start

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