App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 456 · 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 this good or poor button design: grey text on grey? (a) poor design (b) good design
2. 2.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
3. 3.🌗 Is black on yellow 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?
   Done button: 48 px tall
   Cancel button: 48 px tall
   Start button: 56 px tall
   Next button: 32 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 32 px tall
   Next button: 68 px tall
   Back button: 48 px tall (a) Done (b) Back (c) Next
6. 6.Which colour pair is hard to read? (a) black on yellow (b) light grey on white (c) white on black (d) black on pale grey
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 52 px tall
   Send button: 36 px tall
   Save button: 56 px tall (a) Send (b) Cancel (c) Save
8. 8.True or false: space between buttons is poor button design. (a) False (b) True
9. 9.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) black on pale grey (d) red on green
10. 10.True or false: strong colour contrast is poor button design. (a) False (b) True
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
12. 12.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.True or false: a clear word like Save is poor button design. (a) True (b) False
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Cancel button: 64 px tall
    Next button: 48 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Save button: 44 px tall
    Next button: 64 px tall
    Cancel button: 52 px tall
17. 17.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) yellow on white (d) black on pale grey
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Back button: 40 px tall
    Done button: 52 px tall
    Help button: 64 px tall (a) Done (b) Save (c) Help (d) Back
19. 19.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.True or false: a tiny 20 px button is poor button design. (a) False (b) True
22. 22.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
24. 24.🔘 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
    Cancel button: 48 px tall
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Back button: 24 px tall
    Start button: 48 px tall (a) Start (b) Next (c) Back
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Cancel button: 40 px tall
    Send button: 60 px tall
27. 27.True or false: a big, easy tap area is good button design. (a) True (b) False
28. 28.True or false: buttons almost touching is good button design. (a) False (b) True
29. 29.True or false: grey text on grey is good button design. (a) True (b) False
30. 30.True or false: a clear word like Save is good button design. (a) True (b) False
31. 31.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Save button: 60 px tall
    Send button: 44 px tall
    Help button: 64 px tall
34. 34.Which colour pair is easy to read? (a) red on green (b) white on black (c) light grey on white (d) pale pink on white
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Start button: 56 px tall
    Cancel button: 48 px tall
    Help button: 32 px tall (a) Help (b) Start (c) Cancel (d) Send
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Next button: 44 px tall
    Send button: 64 px tall
    Done button: 52 px tall
37. 37.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) pale pink on white (d) light grey on white
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Start button: 72 px tall
    Cancel button: 68 px tall (a) Start (b) Save (c) Cancel
40. 40.True or false: grey text on grey is poor button design. (a) True (b) False

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