App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 516 · 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. The Cancel button is 40 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
3. 3.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 60 px tall
   Cancel button: 68 px tall
   Next button: 28 px tall
   Help button: 60 px tall (a) Next (b) Cancel (c) Back (d) Help
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 44 px tall
   Start button: 52 px tall
   Help button: 48 px tall
7. 7.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
8. 8.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
9. 9.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Done button: 36 px tall
    Cancel button: 32 px tall
    Save button: 56 px tall
11. 11.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) yellow on white (d) black on pale grey
14. 14.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Done button: 40 px tall
    Back button: 36 px tall
    Next button: 40 px tall
16. 16.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Help button: 56 px tall
    Start button: 40 px tall
    Cancel button: 36 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Next button: 32 px tall
    Help button: 64 px tall
19. 19.True or false: a big, easy tap area is poor button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Save button: 36 px tall
    Send button: 56 px tall (a) Save (b) Back (c) Send
21. 21.Which colour pair is hard to read? (a) black on pale grey (b) pale pink on white (c) dark blue on white (d) black on yellow
22. 22.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Save button: 68 px tall
    Send button: 48 px tall
    Back button: 56 px tall (a) Save (b) Back (c) Start (d) Send
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Start button: 52 px tall
    Help button: 28 px tall
    Save button: 68 px tall (a) Done (b) Start (c) Save (d) Help
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
27. 27.True or false: a clear word like Save is poor button design. (a) True (b) False
28. 28.Which colour pair is hard to read? (a) white on black (b) light grey on white (c) white on dark green (d) black on pale grey
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
30. 30.True or false: grey text on grey is poor button design. (a) True (b) False
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Help button: 64 px tall
    Done button: 44 px tall (a) Help (b) Save (c) Done
32. 32.True or false: icons with no meaning is good button design. (a) False (b) True
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Back button: 64 px tall
    Start button: 40 px tall (a) Next (b) Start (c) Back
34. 34.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) black on yellow (d) dark blue on black
35. 35.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Send button: 68 px tall
    Cancel button: 24 px tall
    Start button: 64 px tall (a) Start (b) Done (c) Send (d) Cancel
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Cancel button: 52 px tall
    Back button: 48 px tall (a) Done (b) Cancel (c) Back
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?

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