App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 611 · 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 yellow 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?
   Start button: 40 px tall
   Done button: 40 px tall
   Save button: 48 px tall
   Cancel button: 40 px tall
3. 3.True or false: a tiny 20 px button is good button design. (a) True (b) False
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 72 px tall
   Done button: 32 px tall
   Next button: 72 px tall (a) Start (b) Done (c) Next
5. 5.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) pale pink on white (d) black on yellow
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 48 px tall
   Save button: 44 px tall
   Done button: 56 px tall
   Cancel button: 52 px tall
7. 7.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 44 px tall
   Done button: 48 px tall
   Send button: 64 px tall (a) Start (b) Send (c) Done
9. 9.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) red on green (d) white on dark green
11. 11.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) white on black (d) light grey on white
12. 12.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
13. 13.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.Which colour pair is easy to read? (a) black on pale grey (b) red on green (c) yellow on white (d) light grey on white
15. 15.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
16. 16.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
17. 17.Which colour pair is hard to read? (a) black on pale grey (b) red on green (c) black on yellow (d) dark blue on white
18. 18.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) black on yellow (d) red on green
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Send button: 64 px tall
    Cancel button: 40 px tall
    Start button: 56 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 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?
    Start button: 44 px tall
    Save button: 36 px tall
    Cancel button: 56 px tall
    Next button: 40 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Cancel button: 44 px tall
    Save button: 64 px tall (a) Save (b) Cancel (c) Start
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
26. 26.True or false: strong colour contrast is poor button design. (a) True (b) False
27. 27.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Send button: 36 px tall
    Cancel button: 60 px tall
    Save button: 40 px tall
29. 29.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
31. 31.True or false: buttons almost touching is good button design. (a) False (b) True
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Back button: 60 px tall
    Help button: 64 px tall
33. 33.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) yellow on white (d) white on dark green
34. 34.True or false: strong colour contrast is good button design. (a) True (b) False
35. 35.True or false: buttons almost touching is poor button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Save button: 32 px tall
    Cancel button: 52 px tall
    Help button: 56 px tall (a) Back (b) Save (c) Cancel (d) Help
37. 37.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Next button: 72 px tall
    Cancel button: 44 px tall (a) Cancel (b) Back (c) Next
39. 39.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) white on dark green (d) light grey on white
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Cancel button: 32 px tall
    Help button: 32 px tall

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