App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 315 · 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 clear word like Save is good button design. (a) False (b) True
2. 2.True or false: a big, easy tap area is poor button design. (a) True (b) False
3. 3.🌗 Is red on green 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. The Next button is 40 px tall. How many px taller must it be?
5. 5.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 52 px tall
   Done button: 64 px tall
   Send button: 44 px tall (a) Back (b) Send (c) Done
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
9. 9.True or false: space between buttons is poor button design. (a) False (b) True
10. 10.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.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
12. 12.True or false: icons with no meaning is good button design. (a) False (b) True
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Help button: 60 px tall
    Done button: 72 px tall
    Save button: 40 px tall (a) Save (b) Help (c) Send (d) Done
14. 14.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) light grey on white (d) red on green
15. 15.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) dark blue on black (d) white on dark green
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Save button: 68 px tall
    Start button: 24 px tall (a) Start (b) Save (c) Back
18. 18.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Save button: 72 px tall
    Next button: 56 px tall
    Start button: 56 px tall (a) Start (b) Done (c) Save (d) Next
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Back button: 36 px tall
    Save button: 56 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Done button: 48 px tall
    Save button: 48 px tall
    Start button: 68 px tall (a) Start (b) Done (c) Next (d) Save
24. 24.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
26. 26.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
29. 29.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Cancel button: 36 px tall
    Save button: 48 px tall
    Back button: 44 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Send button: 64 px tall
    Done button: 56 px tall
32. 32.True or false: space between buttons is good button design. (a) False (b) True
33. 33.True or false: buttons almost touching is good button design. (a) True (b) False
34. 34.True or false: buttons almost touching is poor button design. (a) True (b) False
35. 35.Which colour pair is easy to read? (a) white on dark green (b) light grey on white (c) pale pink on white (d) dark blue on black
36. 36.True or false: grey text on grey is poor button design. (a) False (b) True
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Save button: 72 px tall
    Next button: 68 px tall (a) Back (b) Save (c) Next
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Save button: 64 px tall
    Cancel button: 68 px tall
    Back button: 32 px tall (a) Cancel (b) Start (c) Save (d) Back
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Done button: 72 px tall
    Save button: 40 px tall (a) Done (b) Save (c) Next
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Done button: 60 px tall
    Send button: 24 px tall (a) Help (b) Done (c) Send

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