App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 300 · 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 poor button design. (a) True (b) False
2. 2.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
6. 6.True or false: a clear word like Save is good button design. (a) False (b) True
7. 7.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) white on black (d) light grey on white
8. 8.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
10. 10.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Next button: 72 px tall
    Help button: 32 px tall (a) Back (b) Next (c) Help
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
13. 13.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Save button: 44 px tall
    Cancel button: 56 px tall
15. 15.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) yellow on white (d) dark blue on white
16. 16.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
17. 17.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.True or false: grey text on grey is poor button design. (a) False (b) True
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 32 px tall
    Next button: 56 px tall
    Done button: 56 px tall
    Back button: 52 px tall (a) Start (b) Back (c) Next (d) Done
22. 22.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
25. 25.True or false: icons with no meaning is good button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Start button: 64 px tall
    Cancel button: 56 px tall
    Send button: 56 px tall (a) Cancel (b) Send (c) Save (d) Start
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Send button: 60 px tall
    Back button: 68 px tall
    Start button: 52 px tall (a) Send (b) Start (c) Back (d) Help
28. 28.🌗 Is white on dark green 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. The Done button is 40 px tall. How many px taller must it be?
30. 30.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) light grey on white (d) black on yellow
31. 31.Which colour pair is easy to read? (a) black on yellow (b) red on green (c) dark blue on black (d) yellow on white
32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
33. 33.True or false: strong colour contrast is good button design. (a) False (b) True
34. 34.True or false: space between buttons is good button design. (a) False (b) True
35. 35.True or false: strong colour contrast is poor button design. (a) True (b) False
36. 36.True or false: icons with no meaning is poor button design. (a) False (b) True
37. 37.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) pale pink on white (d) light grey on white
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Cancel button: 56 px tall
    Send button: 48 px tall (a) Cancel (b) Save (c) Send
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Back button: 48 px tall
    Save button: 64 px tall
    Next button: 36 px tall

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students