App Dev Worksheet: Button Size and Contrast

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

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