App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 49 · 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: space between buttons is poor button design. (a) False (b) True
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 48 px tall
   Help button: 44 px tall
   Cancel button: 60 px tall
   Done button: 56 px tall
3. 3.True or false: buttons almost touching is good button design. (a) True (b) False
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 56 px tall
   Cancel button: 32 px tall
   Next button: 64 px tall (a) Next (b) Cancel (c) Back
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 32 px tall
   Save button: 68 px tall
   Start button: 48 px tall
   Send button: 68 px tall (a) Done (b) Save (c) Start (d) Send
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
7. 7.True or false: a clear word like Save is poor button design. (a) True (b) False
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 60 px tall
   Help button: 56 px tall
   Next button: 40 px tall (a) Help (b) Next (c) Cancel
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Send button: 56 px tall
    Next button: 52 px tall
    Cancel button: 40 px tall (a) Cancel (b) Send (c) Next (d) Back
12. 12.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
13. 13.True or false: buttons almost touching is poor button design. (a) False (b) True
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Save button: 52 px tall
    Send button: 52 px tall
    Help button: 40 px tall
15. 15.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
16. 16.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Start button: 32 px tall
    Next button: 56 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Save button: 36 px tall
    Cancel button: 52 px tall
    Start button: 60 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Help button: 52 px tall
    Cancel button: 28 px tall (a) Back (b) Help (c) Cancel
20. 20.🌗 Is black on pale grey 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. Which button is too small?
    Send button: 44 px tall
    Back button: 64 px tall
    Help button: 56 px tall
    Next button: 64 px tall (a) Send (b) Next (c) Back (d) Help
22. 22.True or false: a tiny 20 px button is poor button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Cancel button: 60 px tall
    Back button: 60 px tall
    Save button: 32 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
25. 25.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on yellow (d) yellow on white
26. 26.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) black on pale grey (d) dark blue on black
27. 27.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) white on dark green (d) black on yellow
28. 28.True or false: icons with no meaning is good button design. (a) False (b) True
29. 29.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
30. 30.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) dark blue on black (d) white on black
31. 31.Which colour pair is easy to read? (a) red on green (b) white on dark green (c) light grey on white (d) pale pink on white
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Cancel button: 32 px tall
    Help button: 44 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
35. 35.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
36. 36.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.True or false: grey text on grey is good button design. (a) False (b) True
38. 38.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Back button: 64 px tall
    Done button: 64 px tall
    Save button: 48 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Done button: 60 px tall
    Send button: 36 px tall

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