App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 348 · 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: a clear word like Save is poor button design. (a) False (b) True
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 24 px tall
   Send button: 52 px tall
   Cancel button: 48 px tall (a) Save (b) Send (c) Cancel
3. 3.Which colour pair is hard to read? (a) yellow on white (b) black on pale grey (c) black on yellow (d) white on dark green
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 36 px tall
   Save button: 40 px tall
   Send button: 60 px tall
6. 6.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 32 px tall
   Help button: 36 px tall
   Next button: 60 px tall
   Save button: 60 px tall
8. 8.🌗 Is dark blue 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: strong colour contrast? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
11. 11.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.True or false: a big, easy tap area 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?
    Back button: 56 px tall
    Help button: 48 px tall
    Cancel button: 64 px tall
    Save button: 48 px tall
15. 15.True or false: space between buttons is poor button design. (a) True (b) False
16. 16.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Start button: 36 px tall
    Done button: 44 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Start button: 64 px tall
    Back button: 52 px tall
    Cancel button: 64 px tall (a) Start (b) Cancel (c) Next (d) Back
19. 19.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.True or false: strong colour contrast is poor button design. (a) True (b) False
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
22. 22.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) black on pale grey (d) light grey on white
23. 23.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Help button: 48 px tall
    Done button: 64 px tall (a) Back (b) Done (c) Help
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Back button: 44 px tall
    Send button: 52 px tall
    Help button: 52 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Save button: 40 px tall
    Help button: 64 px tall (a) Save (b) Help (c) Done
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
29. 29.True or false: grey text on grey is poor button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Start button: 64 px tall
    Send button: 60 px tall
    Cancel button: 32 px tall
31. 31.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) white on black (d) red on green
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Next button: 52 px tall
    Send button: 64 px tall (a) Next (b) Send (c) Cancel
33. 33.Which colour pair is hard to read? (a) light grey on white (b) white on dark green (c) black on yellow (d) dark blue on white
34. 34.True or false: strong colour contrast is good button design. (a) False (b) True
35. 35.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) white on dark green (d) dark blue on black
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Next button: 44 px tall
    Start button: 48 px tall
    Cancel button: 56 px tall
39. 39.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Send button: 44 px tall
    Cancel button: 48 px tall
    Back button: 40 px tall

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