App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 96 · 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 pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 44 px tall
   Back button: 64 px tall
   Send button: 32 px tall
   Done button: 48 px tall
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 28 px tall
   Cancel button: 64 px tall
   Save button: 68 px tall (a) Next (b) Cancel (c) Save
4. 4.True or false: a tiny 20 px button is good button design. (a) True (b) False
5. 5.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) black on pale grey (d) pale pink on white
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
7. 7.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) dark blue on black (d) white on dark green
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 44 px tall
   Help button: 52 px tall
   Send button: 52 px tall
   Done button: 52 px tall
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
10. 10.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
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.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
13. 13.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
15. 15.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Send button: 52 px tall
    Done button: 28 px tall (a) Next (b) Send (c) Done
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Start button: 68 px tall
    Send button: 56 px tall (a) Help (b) Send (c) Start
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Save button: 36 px tall
    Cancel button: 56 px tall
    Back button: 48 px tall (a) Back (b) Help (c) Save (d) Cancel
19. 19.True or false: strong colour contrast is good button design. (a) True (b) False
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Done button: 40 px tall
    Start button: 36 px tall
21. 21.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Done button: 52 px tall
    Next button: 48 px tall
    Help button: 44 px tall (a) Help (b) Done (c) Start (d) Next
23. 23.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
27. 27.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
29. 29.Which colour pair is hard to read? (a) light grey on white (b) white on dark green (c) black on yellow (d) dark blue on white
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
31. 31.Which colour pair is hard to read? (a) black on pale grey (b) red on green (c) dark blue on white (d) white on dark green
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
33. 33.True or false: a clear word like Save is poor button design. (a) False (b) True
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Start button: 32 px tall
    Save button: 48 px tall
    Help button: 48 px tall (a) Help (b) Cancel (c) Save (d) Start
35. 35.Which colour pair is hard to read? (a) pale pink on white (b) black on yellow (c) white on dark green (d) black on pale grey
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Help button: 56 px tall
    Done button: 52 px tall (a) Done (b) Help (c) Next
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Help button: 40 px tall
    Start button: 36 px tall
    Done button: 40 px tall
38. 38.True or false: a tiny 20 px button is poor button design. (a) True (b) False
39. 39.True or false: space between buttons is poor button design. (a) True (b) False
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Done button: 48 px tall
    Back button: 64 px tall

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