App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 538 · 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. The Next button is 20 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 36 px tall
   Save button: 60 px tall
   Done button: 36 px tall
   Help button: 44 px tall
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 48 px tall
   Save button: 28 px tall
   Cancel button: 48 px tall
   Done button: 52 px tall (a) Back (b) Done (c) Save (d) Cancel
4. 4.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
5. 5.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.True or false: a big, easy tap area is poor button design. (a) False (b) True
10. 10.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) black on yellow (d) red on green
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Next button: 28 px tall
    Start button: 52 px tall (a) Send (b) Start (c) Next
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Help button: 52 px tall
    Cancel button: 44 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) white on dark green (b) red on green (c) pale pink on white (d) yellow on white
15. 15.True or false: a tiny 20 px button is poor button design. (a) True (b) False
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
17. 17.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) light grey on white (d) white on black
18. 18.True or false: a clear word like Save is poor button design. (a) False (b) True
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Next button: 68 px tall
    Help button: 28 px tall (a) Next (b) Help (c) Save
20. 20.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
21. 21.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
23. 23.🌗 Is red on green 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. Which button is too small?
    Start button: 60 px tall
    Save button: 36 px tall
    Done button: 48 px tall (a) Save (b) Done (c) Start
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
26. 26.True or false: a clear word like Save is good button design. (a) False (b) True
27. 27.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) yellow on white (d) dark blue on black
28. 28.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
29. 29.True or false: a big, easy tap area is good button design. (a) False (b) True
30. 30.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) black on yellow (d) dark blue on black
31. 31.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Done button: 72 px tall
    Save button: 24 px tall
    Back button: 68 px tall (a) Send (b) Done (c) Save (d) Back
33. 33.True or false: grey text on grey is good button design. (a) True (b) False
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Cancel button: 32 px tall
    Back button: 40 px tall
35. 35.True or false: buttons almost touching is poor button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Cancel button: 48 px tall
    Back button: 24 px tall
    Next button: 60 px tall (a) Start (b) Cancel (c) Back (d) Next
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Next button: 44 px tall
    Done button: 64 px tall
    Start button: 68 px tall (a) Next (b) Start (c) Done (d) Save
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Help button: 60 px tall
    Next button: 56 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Start button: 52 px tall
    Done button: 60 px tall
    Help button: 24 px tall (a) Start (b) Help (c) Done (d) Send

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