App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 371 · 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. How many of these buttons follow the rule?
   Start button: 56 px tall
   Done button: 64 px tall
   Back button: 44 px tall
2. 2.True or false: buttons almost touching is poor button design. (a) True (b) False
3. 3.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) light grey on white (d) red on green
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 60 px tall
   Send button: 44 px tall
   Back button: 40 px tall
   Save button: 36 px tall
5. 5.Which colour pair is hard to read? (a) dark blue on white (b) red on green (c) black on pale grey (d) white on black
6. 6.True or false: space between buttons is good button design. (a) True (b) False
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
8. 8.Which colour pair is easy to read? (a) dark blue on black (b) black on pale grey (c) light grey on white (d) yellow on white
9. 9.True or false: grey text on grey is poor button design. (a) False (b) True
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Next button: 24 px tall
    Done button: 68 px tall
    Help button: 52 px tall (a) Next (b) Help (c) Save (d) Done
11. 11.Which colour pair is easy to read? (a) dark blue on black (b) black on yellow (c) pale pink on white (d) red on green
12. 12.True or false: a big, easy tap area is poor button design. (a) True (b) False
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
14. 14.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) black on pale grey (d) black on yellow
16. 16.True or false: a clear word like Save is good button design. (a) True (b) False
17. 17.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Start button: 40 px tall
    Back button: 32 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
20. 20.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Cancel button: 40 px tall
    Send button: 40 px tall
    Back button: 48 px tall
22. 22.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
23. 23.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
24. 24.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.Which colour pair is hard to read? (a) dark blue on black (b) white on dark green (c) dark blue on white (d) black on pale grey
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Back button: 48 px tall
    Next button: 32 px tall
    Start button: 36 px tall
27. 27.True or false: icons with no meaning is good button design. (a) False (b) True
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Cancel button: 60 px tall
    Done button: 60 px tall
    Send button: 52 px tall (a) Done (b) Back (c) Send (d) Cancel
29. 29.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Help button: 52 px tall
    Save button: 48 px tall
    Cancel button: 24 px tall (a) Cancel (b) Save (c) Back (d) Help
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 36 px tall
    Cancel button: 48 px tall
    Back button: 68 px tall (a) Start (b) Back (c) Cancel
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Done button: 36 px tall
    Send button: 68 px tall (a) Send (b) Done (c) Start
33. 33.True or false: buttons almost touching is good button design. (a) True (b) False
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Save button: 56 px tall
    Help button: 48 px tall
    Cancel button: 24 px tall (a) Save (b) Help (c) Send (d) Cancel
35. 35.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Next button: 48 px tall
    Back button: 56 px tall (a) Next (b) Back (c) Cancel
39. 39.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?

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