App Dev Worksheet: Button Size and Contrast

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

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