App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 352 · 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?
   Send button: 72 px tall
   Help button: 56 px tall
   Save button: 44 px tall (a) Send (b) Help (c) Save
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 56 px tall
   Start button: 52 px tall
   Next button: 56 px tall
3. 3.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.True or false: space between buttons is good button design. (a) True (b) False
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 44 px tall
   Send button: 52 px tall
   Back button: 44 px tall
   Next button: 52 px tall
6. 6.True or false: a tiny 20 px button is poor button design. (a) True (b) False
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 60 px tall
   Save button: 44 px tall
   Send button: 36 px tall
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
10. 10.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) white on dark green (d) red on green
11. 11.True or false: buttons almost touching is poor button design. (a) True (b) False
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Save button: 68 px tall
    Start button: 56 px tall
    Next button: 32 px tall (a) Save (b) Send (c) Start (d) Next
15. 15.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
16. 16.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.Which colour pair is hard to read? (a) light grey on white (b) black on pale grey (c) white on dark green (d) black on yellow
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Done button: 36 px tall
    Next button: 64 px tall
20. 20.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.True or false: a big, easy tap area is poor button design. (a) True (b) False
22. 22.True or false: icons with no meaning 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?
    Save button: 36 px tall
    Help button: 60 px tall
    Next button: 36 px tall
    Back button: 40 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Start button: 44 px tall
    Back button: 60 px tall (a) Start (b) Back (c) Save
25. 25.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
26. 26.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 36 px tall
    Cancel button: 52 px tall
    Save button: 72 px tall
    Done button: 56 px tall (a) Cancel (b) Save (c) Done (d) Start
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Save button: 40 px tall
    Start button: 60 px tall (a) Save (b) Send (c) Start
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
30. 30.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) dark blue on white (d) light grey on white
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
32. 32.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
33. 33.True or false: a big, easy tap area is good button design. (a) True (b) False
34. 34.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Next button: 60 px tall
    Save button: 32 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
37. 37.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) pale pink on white (d) white on dark green
38. 38.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) red on green (d) white on black
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Done button: 72 px tall
    Next button: 44 px tall (a) Next (b) Done (c) Help
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Save button: 60 px tall
    Send button: 64 px tall

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