App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 299 · 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.True or false: space between buttons is good button design. (a) False (b) True
2. 2.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) red on green (d) black on pale grey
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 60 px tall
   Back button: 36 px tall
   Cancel button: 64 px tall
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 64 px tall
   Next button: 56 px tall
   Done button: 52 px tall
   Save button: 36 px tall (a) Back (b) Next (c) Save (d) Done
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
7. 7.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) light grey on white (d) yellow on white
8. 8.🔘 Is this good or poor button design: buttons almost touching? (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. The Back button is 40 px tall. How many px taller must it be?
11. 11.Which colour pair is hard to read? (a) pale pink on white (b) white on dark green (c) dark blue on white (d) white on black
12. 12.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
13. 13.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) black on pale grey (d) pale pink on white
14. 14.True or false: strong colour contrast is good button design. (a) True (b) False
15. 15.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Save button: 36 px tall
    Done button: 52 px tall
17. 17.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Cancel button: 48 px tall
    Next button: 64 px tall
    Done button: 60 px tall (a) Cancel (b) Next (c) Done (d) Save
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
21. 21.True or false: a big, easy tap area is poor button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Done button: 32 px tall
    Next button: 32 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Done button: 32 px tall
    Cancel button: 64 px tall
    Save button: 36 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
25. 25.True or false: buttons almost touching is good button design. (a) False (b) True
26. 26.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🌗 Is red on green 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. The Next button is 24 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 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.Which colour pair is hard to read? (a) light grey on white (b) black on pale grey (c) white on black (d) black on yellow
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Cancel button: 64 px tall
    Next button: 24 px tall (a) Next (b) Save (c) Cancel
33. 33.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) dark blue on black (d) dark blue on white
34. 34.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Start button: 48 px tall
    Cancel button: 32 px tall
    Done button: 68 px tall (a) Save (b) Start (c) Cancel (d) Done
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Help button: 52 px tall
    Done button: 64 px tall
    Next button: 40 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Start button: 48 px tall
    Save button: 28 px tall
    Send button: 68 px tall (a) Start (b) Send (c) Done (d) Save
38. 38.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
40. 40.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design

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