App Dev Worksheet: Button Size and Contrast

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

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