App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 593 · 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.Which colour pair is easy to read? (a) light grey on white (b) white on black (c) yellow on white (d) pale pink on white
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 44 px tall
   Next button: 64 px tall
   Send button: 68 px tall (a) Send (b) Save (c) Next
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
5. 5.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) white on dark green (d) yellow on white
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 40 px tall
   Save button: 56 px tall
   Done button: 48 px tall
   Back button: 48 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 40 px tall
   Next button: 36 px tall
   Save button: 52 px tall
8. 8.True or false: a clear word like Save is good button design. (a) False (b) True
9. 9.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) white on dark green (d) dark blue on black
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Save button: 40 px tall
    Done button: 56 px tall
    Next button: 40 px tall
12. 12.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
14. 14.True or false: buttons almost touching is good button design. (a) False (b) True
15. 15.True or false: grey text on grey is poor button design. (a) False (b) True
16. 16.Which colour pair is hard to read? (a) pale pink on white (b) black on pale grey (c) black on yellow (d) dark blue on white
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Help button: 60 px tall
    Start button: 72 px tall
    Save button: 24 px tall (a) Help (b) Start (c) Done (d) Save
18. 18.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
20. 20.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) black on pale grey (d) dark blue on black
21. 21.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
22. 22.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
26. 26.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) black on yellow (d) red on green
27. 27.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Cancel button: 60 px tall
    Back button: 24 px tall (a) Back (b) Start (c) Cancel
29. 29.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Cancel button: 64 px tall
    Start button: 32 px tall
    Help button: 60 px tall
31. 31.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
32. 32.🌗 Is red on green 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 Done button is 40 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Save button: 68 px tall
    Cancel button: 72 px tall
    Done button: 68 px tall (a) Save (b) Done (c) Next (d) Cancel
35. 35.True or false: a clear word like Save is poor button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Start button: 64 px tall
    Next button: 68 px tall
    Done button: 40 px tall (a) Next (b) Done (c) Save (d) Start
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Send button: 64 px tall
    Help button: 28 px tall (a) Help (b) Back (c) Send
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Next button: 24 px tall
    Cancel button: 64 px tall
    Send button: 48 px tall (a) Start (b) Send (c) Next (d) Cancel
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Back button: 68 px tall
    Cancel button: 32 px tall
    Done button: 72 px tall (a) Save (b) Done (c) Back (d) Cancel
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Back button: 36 px tall
    Save button: 48 px tall (a) Back (b) Save (c) Done

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