App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 562 · 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
   Send button: 68 px tall
   Save button: 40 px tall (a) Send (b) Next (c) Save
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 44 px tall
   Back button: 52 px tall
   Help button: 64 px tall
   Next button: 44 px tall
3. 3.🌗 Is dark blue on black 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. How many of these buttons follow the rule?
   Start button: 32 px tall
   Cancel button: 56 px tall
   Next button: 40 px tall
   Save button: 32 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 60 px tall
   Next button: 24 px tall
   Send button: 68 px tall (a) Help (b) Send (c) Next
6. 6.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
8. 8.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.True or false: strong colour contrast is good button design. (a) True (b) False
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Help button: 56 px tall
    Done button: 52 px tall (a) Help (b) Done (c) Cancel
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Start button: 32 px tall
    Back button: 56 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Back button: 44 px tall
    Help button: 68 px tall
    Start button: 64 px tall (a) Back (b) Next (c) Help (d) Start
14. 14.True or false: buttons almost touching is good button design. (a) False (b) True
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Save button: 36 px tall
    Next button: 64 px tall (a) Send (b) Save (c) Next
16. 16.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) white on dark green (d) light grey on white
17. 17.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🔘 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: 64 px tall
19. 19.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
20. 20.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) red on green (d) black on pale grey
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
22. 22.Which colour pair is easy to read? (a) dark blue on white (b) light grey on white (c) dark blue on black (d) yellow on white
23. 23.True or false: a big, easy tap area is good button design. (a) False (b) True
24. 24.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Start button: 64 px tall
    Save button: 32 px tall
26. 26.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Cancel button: 40 px tall
    Send button: 60 px tall (a) Send (b) Cancel (c) Start
29. 29.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) black on pale grey (d) dark blue on black
30. 30.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) black on yellow (d) dark blue on black
32. 32.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Start button: 32 px tall
    Cancel button: 60 px tall
34. 34.True or false: space between buttons is good button design. (a) True (b) False
35. 35.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
36. 36.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
37. 37.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Help button: 52 px tall
    Start button: 52 px tall
    Send button: 32 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 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?
    Send button: 40 px tall
    Back button: 60 px tall
    Help button: 44 px tall
    Cancel button: 40 px tall

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