App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 497 · 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: icons with no meaning is poor button design. (a) True (b) False
2. 2.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
4. 4.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) dark blue on white (d) white on dark green
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 52 px tall
   Save button: 64 px tall
   Next button: 52 px tall
   Done button: 36 px tall (a) Save (b) Done (c) Cancel (d) Next
7. 7.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) white on black (d) red on green
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 48 px tall
   Cancel button: 52 px tall
   Send button: 60 px tall
   Start button: 64 px tall
9. 9.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Done button: 64 px tall
    Save button: 60 px tall (a) Back (b) Save (c) Done
11. 11.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.True or false: a clear word like Save is good button design. (a) False (b) True
13. 13.True or false: icons with no meaning is good button design. (a) True (b) False
14. 14.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Next button: 52 px tall
    Cancel button: 72 px tall (a) Cancel (b) Help (c) Next
16. 16.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) yellow on white (d) black on pale grey
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Next button: 28 px tall
    Done button: 52 px tall (a) Start (b) Done (c) Next
18. 18.True or false: a clear word like Save is poor button design. (a) True (b) False
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Help button: 28 px tall
    Start button: 64 px tall (a) Help (b) Cancel (c) Start
20. 20.True or false: space between buttons is poor button design. (a) True (b) False
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
22. 22.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
23. 23.True or false: buttons almost touching is good button design. (a) False (b) True
24. 24.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.True or false: space between buttons is good button design. (a) False (b) True
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Cancel button: 56 px tall
    Done button: 68 px tall
    Back button: 52 px tall (a) Send (b) Done (c) Cancel (d) Back
27. 27.True or false: grey text on grey is poor button design. (a) True (b) False
28. 28.🌗 Is pale pink on white 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?
    Send button: 40 px tall
    Cancel button: 64 px tall
    Back button: 72 px tall (a) Send (b) Cancel (c) Back
30. 30.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
31. 31.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
32. 32.🌗 Is dark blue on black 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?
    Send button: 64 px tall
    Next button: 52 px tall
    Start button: 36 px tall
34. 34.True or false: a big, easy tap area is good button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Next button: 64 px tall
    Done button: 44 px tall
    Help button: 56 px tall (a) Back (b) Next (c) Help (d) Done
36. 36.True or false: buttons almost touching is poor button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 36 px tall
    Cancel button: 48 px tall
    Send button: 60 px tall
    Save button: 68 px tall (a) Start (b) Send (c) Cancel (d) Save
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Next button: 60 px tall
    Back button: 64 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?

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