App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 349 · 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?
   Start button: 72 px tall
   Send button: 72 px tall
   Cancel button: 24 px tall
   Save button: 60 px tall (a) Start (b) Send (c) Save (d) Cancel
2. 2.Which colour pair is easy to read? (a) black on pale grey (b) pale pink on white (c) light grey on white (d) red on green
3. 3.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
6. 6.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 64 px tall
   Help button: 64 px tall
   Save button: 36 px tall (a) Help (b) Send (c) Save
9. 9.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
11. 11.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) red on green (d) pale pink on white
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Send button: 40 px tall
    Done button: 48 px tall
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Send button: 36 px tall
    Cancel button: 48 px tall
    Help button: 64 px tall
14. 14.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
15. 15.True or false: a clear word like Save is good button design. (a) True (b) False
16. 16.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
18. 18.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Start button: 68 px tall
    Back button: 44 px tall
    Cancel button: 60 px tall (a) Send (b) Cancel (c) Start (d) Back
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
21. 21.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) red on green (d) white on black
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Next button: 60 px tall
    Send button: 36 px tall
24. 24.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) white on black (d) red on green
25. 25.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
27. 27.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) dark blue on black (d) black on yellow
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Send button: 72 px tall
    Save button: 56 px tall (a) Save (b) Send (c) Start
29. 29.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Save button: 40 px tall
    Send button: 60 px tall
31. 31.True or false: space between buttons is good button design. (a) True (b) False
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Done button: 56 px tall
    Start button: 60 px tall (a) Start (b) Done (c) Cancel
34. 34.True or false: grey text on grey is poor button design. (a) True (b) False
35. 35.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Start button: 36 px tall
    Save button: 64 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Next button: 40 px tall
    Help button: 32 px tall
39. 39.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Start button: 64 px tall
    Save button: 68 px tall
    Send button: 52 px tall (a) Save (b) Send (c) Start (d) Help

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