App Dev Worksheet: Button Size and Contrast

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

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