App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 635 · 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 Done button is 20 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 44 px tall
   Next button: 52 px tall
   Done button: 40 px tall
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 44 px tall
   Back button: 48 px tall
   Cancel button: 64 px tall
   Next button: 68 px tall (a) Next (b) Cancel (c) Back (d) Help
5. 5.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
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?
   Done button: 52 px tall
   Back button: 60 px tall
   Cancel button: 24 px tall (a) Cancel (b) Done (c) Back
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 72 px tall
   Start button: 60 px tall
   Next button: 28 px tall (a) Back (b) Next (c) Start
10. 10.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
11. 11.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
12. 12.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on white (d) red on green
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Done button: 64 px tall
    Send button: 60 px tall
    Start button: 48 px tall
14. 14.True or false: strong colour contrast is poor button design. (a) True (b) False
15. 15.True or false: a tiny 20 px button is good button design. (a) True (b) False
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Cancel button: 44 px tall
    Help button: 52 px tall
17. 17.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Next button: 32 px tall
    Send button: 64 px tall
    Help button: 32 px tall
19. 19.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) black on yellow (d) light grey on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Start button: 52 px tall
    Cancel button: 52 px tall
    Save button: 44 px tall (a) Cancel (b) Back (c) Start (d) Save
21. 21.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.Which colour pair is hard to read? (a) dark blue on white (b) light grey on white (c) white on dark green (d) white on black
23. 23.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Start button: 64 px tall
    Save button: 40 px tall
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
26. 26.True or false: icons with no meaning is poor button design. (a) True (b) False
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Start button: 48 px tall
    Back button: 36 px tall (a) Back (b) Help (c) Start
28. 28.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
29. 29.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) white on black (d) black on pale grey
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Next button: 64 px tall
    Back button: 32 px tall
    Cancel button: 48 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
33. 33.True or false: a big, easy tap area is poor button design. (a) True (b) False
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
35. 35.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) white on black (d) dark blue on black
36. 36.True or false: a clear word like Save is poor button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Next button: 68 px tall
    Done button: 48 px tall (a) Done (b) Cancel (c) Next
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Cancel button: 52 px tall
    Next button: 36 px tall
    Save button: 48 px tall (a) Save (b) Next (c) Done (d) Cancel
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Done button: 28 px tall
    Next button: 68 px tall (a) Cancel (b) Done (c) Next
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Start button: 68 px tall
    Done button: 56 px tall (a) Start (b) Back (c) Done

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