App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 283 · 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: a clear word like Save? (a) good design (b) poor design
2. 2.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.True or false: strong colour contrast is good button design. (a) True (b) False
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 36 px tall
   Cancel button: 36 px tall
   Next button: 44 px tall
6. 6.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) dark blue on white (d) yellow on white
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 68 px tall
   Help button: 24 px tall
   Done button: 68 px tall (a) Help (b) Done (c) Cancel
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 72 px tall
   Save button: 48 px tall
   Help button: 24 px tall (a) Save (b) Send (c) Help
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 64 px tall
   Back button: 44 px tall
   Cancel button: 48 px tall
   Send button: 36 px tall
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Done button: 24 px tall
    Start button: 72 px tall (a) Help (b) Done (c) Start
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Done button: 56 px tall
    Back button: 60 px tall
    Next button: 36 px tall
12. 12.True or false: space between buttons is good button design. (a) False (b) True
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
14. 14.True or false: space between buttons is poor button design. (a) True (b) False
15. 15.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
16. 16.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
17. 17.True or false: grey text on grey is good button design. (a) True (b) False
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Save button: 40 px tall
    Start button: 56 px tall
    Help button: 32 px tall
19. 19.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.True or false: grey text on grey is poor button design. (a) False (b) True
21. 21.🌗 Is black on pale grey 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. Which button is too small?
    Start button: 48 px tall
    Save button: 36 px tall
    Cancel button: 72 px tall
    Send button: 64 px tall (a) Cancel (b) Send (c) Start (d) Save
23. 23.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) red on green (d) dark blue on white
24. 24.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) white on dark green (d) pale pink on white
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
27. 27.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Start button: 44 px tall
    Back button: 32 px tall
    Help button: 40 px tall
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
31. 31.True or false: icons with no meaning is good button design. (a) True (b) False
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Next button: 68 px tall
    Send button: 48 px tall (a) Next (b) Send (c) Start
33. 33.True or false: a clear word like Save is poor button design. (a) True (b) False
34. 34.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) pale pink on white (d) light grey on white
35. 35.True or false: buttons almost touching is poor button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Send button: 52 px tall
    Back button: 24 px tall (a) Back (b) Send (c) Help
38. 38.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) white on dark green (d) dark blue on black
39. 39.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Back button: 72 px tall
    Cancel button: 52 px tall (a) Cancel (b) Next (c) Back

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