App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 410 · 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 black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.True or false: a big, easy tap area is poor button design. (a) True (b) False
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 28 px tall
   Start button: 56 px tall
   Save button: 72 px tall
   Done button: 56 px tall (a) Cancel (b) Start (c) Done (d) Save
4. 4.Which colour pair is easy to read? (a) dark blue on black (b) black on yellow (c) light grey on white (d) red on green
5. 5.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 48 px tall
   Next button: 40 px tall
   Help button: 60 px tall
7. 7.Which colour pair is hard to read? (a) white on black (b) dark blue on black (c) dark blue on white (d) black on yellow
8. 8.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 32 px tall
   Cancel button: 32 px tall
   Save button: 40 px tall
10. 10.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) pale pink on white (d) black on pale grey
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. Which button is too small?
    Cancel button: 68 px tall
    Help button: 24 px tall
    Back button: 72 px tall (a) Help (b) Cancel (c) Back
14. 14.True or false: space between buttons is good button design. (a) True (b) False
15. 15.True or false: a big, easy tap area is good button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
17. 17.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) black on pale grey (d) light grey on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Help button: 36 px tall
    Done button: 36 px tall
    Next button: 52 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Cancel button: 72 px tall
    Help button: 68 px tall
    Done button: 40 px tall (a) Cancel (b) Done (c) Back (d) Help
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Next button: 36 px tall
    Back button: 60 px tall
    Start button: 60 px tall (a) Cancel (b) Back (c) Next (d) Start
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
22. 22.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) light grey on white (d) white on black
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
24. 24.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
25. 25.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
26. 26.True or false: icons with no meaning is good button design. (a) True (b) False
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
28. 28.🌗 Is black on pale grey 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. Which button is too small?
    Start button: 52 px tall
    Cancel button: 68 px tall
    Help button: 36 px tall (a) Cancel (b) Start (c) Help
30. 30.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
31. 31.True or false: grey text on grey is good button design. (a) True (b) False
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Done button: 40 px tall
    Save button: 60 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Save button: 48 px tall
    Start button: 48 px tall
    Done button: 56 px tall (a) Done (b) Save (c) Start (d) Next
34. 34.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on white (d) yellow on white
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Help button: 56 px tall
    Save button: 36 px tall
36. 36.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) white on dark green (d) red on green
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
38. 38.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
39. 39.True or false: grey text on grey is poor button design. (a) True (b) False
40. 40.True or false: a clear word like Save is good button design. (a) False (b) True

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