App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 518 · 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?
   Next button: 52 px tall
   Help button: 64 px tall
   Send button: 60 px tall
   Done button: 36 px tall (a) Done (b) Help (c) Send (d) Next
2. 2.Which colour pair is easy to read? (a) black on yellow (b) yellow on white (c) red on green (d) light grey on white
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 36 px tall
   Done button: 56 px tall
   Help button: 64 px tall
4. 4.True or false: a big, easy tap area is poor button design. (a) False (b) True
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 44 px tall
   Cancel button: 48 px tall
   Done button: 52 px tall (a) Done (b) Start (c) Cancel
6. 6.True or false: space between buttons is poor button design. (a) False (b) True
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 72 px tall
   Back button: 40 px tall
   Cancel button: 52 px tall
   Start button: 52 px tall (a) Start (b) Back (c) Cancel (d) Save
8. 8.True or false: a big, easy tap area is good button design. (a) False (b) True
9. 9.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.Which colour pair is easy to read? (a) dark blue on black (b) white on dark green (c) red on green (d) yellow on white
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Next button: 56 px tall
    Help button: 24 px tall
    Done button: 48 px tall (a) Next (b) Back (c) Done (d) Help
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
13. 13.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
14. 14.Which colour pair is easy to read? (a) yellow on white (b) black on pale grey (c) pale pink on white (d) red on green
15. 15.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
17. 17.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Send button: 32 px tall
    Cancel button: 64 px tall
    Next button: 68 px tall (a) Send (b) Next (c) Done (d) Cancel
21. 21.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) red on green (d) pale pink on white
22. 22.True or false: a clear word like Save is good 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?
    Cancel button: 36 px tall
    Next button: 48 px tall
    Done button: 36 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
27. 27.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) light grey on white (d) white on black
28. 28.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Start button: 40 px tall
    Next button: 40 px tall
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Save button: 60 px tall
    Send button: 60 px tall (a) Start (b) Save (c) Send
31. 31.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
33. 33.True or false: buttons almost touching is good button design. (a) True (b) False
34. 34.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) white on dark green (d) white on black
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Next button: 36 px tall
    Save button: 52 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Done button: 44 px tall
    Help button: 64 px tall
    Start button: 56 px tall (a) Back (b) Start (c) Done (d) Help
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Start button: 32 px tall
    Save button: 48 px tall
    Done button: 52 px tall (a) Back (b) Done (c) Start (d) Save
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Send button: 60 px tall
    Next button: 32 px tall
    Help button: 44 px tall

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