App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 432 · 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 hard to read? (a) white on black (b) dark blue on white (c) light grey on white (d) black on yellow
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 60 px tall
   Save button: 48 px tall
   Back button: 48 px tall
   Start button: 36 px tall (a) Back (b) Start (c) Save (d) Send
3. 3.True or false: a clear word like Save is good button design. (a) True (b) False
4. 4.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 72 px tall
   Save button: 36 px tall
   Help button: 64 px tall
   Next button: 52 px tall (a) Cancel (b) Help (c) Next (d) Save
6. 6.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 44 px tall
   Send button: 60 px tall
   Save button: 36 px tall
   Help button: 60 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 28 px tall
   Cancel button: 60 px tall
   Back button: 48 px tall (a) Save (b) Cancel (c) Back
10. 10.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
14. 14.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.Which colour pair is easy to read? (a) white on black (b) yellow on white (c) red on green (d) light grey on white
16. 16.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Save button: 48 px tall
    Done button: 64 px tall
    Back button: 36 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Help button: 40 px tall
    Next button: 44 px tall
    Done button: 36 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
20. 20.True or false: a clear word like Save is poor button design. (a) True (b) False
21. 21.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Next button: 40 px tall
    Back button: 64 px tall
23. 23.True or false: icons with no meaning is good button design. (a) False (b) True
24. 24.True or false: buttons almost touching is good button design. (a) False (b) True
25. 25.True or false: strong colour contrast is good button design. (a) False (b) True
26. 26.True or false: strong colour contrast is poor button design. (a) True (b) False
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: 64 px tall
    Cancel button: 36 px tall
    Save button: 36 px tall
28. 28.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Next button: 60 px tall
    Send button: 36 px tall
    Back button: 48 px tall
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
31. 31.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) light grey on white (d) red on green
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Send button: 68 px tall
    Save button: 68 px tall
    Help button: 52 px tall (a) Help (b) Cancel (c) Send (d) Save
34. 34.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Done button: 48 px tall
    Cancel button: 68 px tall (a) Next (b) Done (c) Cancel
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Done button: 40 px tall
    Help button: 64 px tall
38. 38.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Cancel button: 36 px tall
    Send button: 32 px tall
40. 40.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read

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