App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 168 · 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.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor 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?
   Save button: 72 px tall
   Start button: 60 px tall
   Send button: 48 px tall
   Cancel button: 44 px tall (a) Save (b) Start (c) Send (d) Cancel
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
6. 6.True or false: a tiny 20 px button is good button design. (a) True (b) False
7. 7.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
8. 8.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 44 px tall
   Next button: 52 px tall
   Back button: 40 px tall
10. 10.True or false: space between buttons is poor button design. (a) True (b) False
11. 11.True or false: grey text on grey is poor button design. (a) False (b) True
12. 12.True or false: a big, easy tap area is good button design. (a) True (b) False
13. 13.True or false: icons with no meaning is good button design. (a) True (b) False
14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Send button: 64 px tall
    Save button: 56 px tall
16. 16.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) white on black (d) red on green
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Done button: 56 px tall
    Next button: 72 px tall
    Help button: 56 px tall (a) Next (b) Cancel (c) Help (d) Done
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Start button: 60 px tall
    Back button: 64 px tall
    Help button: 52 px tall
19. 19.🌗 Is dark blue on black 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. The Save button is 24 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Cancel button: 48 px tall
    Send button: 64 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Help button: 64 px tall
    Next button: 52 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Cancel button: 72 px tall
    Next button: 40 px tall (a) Start (b) Cancel (c) Next
24. 24.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) white on dark green (d) red on green
25. 25.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Cancel button: 44 px tall
    Back button: 68 px tall (a) Back (b) Save (c) Cancel
27. 27.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Send button: 64 px tall
    Start button: 60 px tall (a) Send (b) Cancel (c) Start
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Send button: 32 px tall
    Save button: 36 px tall
30. 30.Which colour pair is easy to read? (a) yellow on white (b) white on black (c) pale pink on white (d) light grey on white
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
32. 32.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.True or false: a clear word like Save is poor button design. (a) True (b) False
34. 34.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Send button: 32 px tall
    Back button: 32 px tall
37. 37.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Back button: 60 px tall
    Help button: 60 px tall
    Send button: 36 px tall
39. 39.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) yellow on white (d) white on dark green
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?

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