App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 47 · 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) black on yellow (b) dark blue on white (c) white on black (d) yellow on white
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 32 px tall
   Start button: 32 px tall
   Save button: 64 px tall
   Send button: 64 px tall
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 36 px tall
   Help button: 56 px tall
   Done button: 56 px tall
4. 4.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.True or false: a clear word like Save is poor button design. (a) False (b) True
6. 6.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 40 px tall
   Back button: 32 px tall
   Save button: 48 px tall
9. 9.True or false: grey text on grey is poor button design. (a) False (b) True
10. 10.True or false: strong colour contrast is good button design. (a) False (b) True
11. 11.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) black on pale grey (d) yellow on white
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Send button: 32 px tall
    Help button: 48 px tall
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
14. 14.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
15. 15.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.True or false: a big, easy tap area is good button design. (a) False (b) True
17. 17.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
18. 18.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Help button: 48 px tall
    Save button: 68 px tall (a) Help (b) Save (c) Back
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
22. 22.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) dark blue on white (d) light grey on white
24. 24.Which colour pair is easy to read? (a) black on yellow (b) yellow on white (c) pale pink on white (d) red on green
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Next button: 56 px tall
    Done button: 48 px tall
    Save button: 52 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Cancel button: 24 px tall
    Next button: 56 px tall (a) Save (b) Next (c) Cancel
27. 27.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) light grey on white (d) red on green
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Start button: 52 px tall
    Save button: 60 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Save button: 56 px tall
    Done button: 36 px tall (a) Done (b) Back (c) Save
33. 33.True or false: space between buttons is good button design. (a) True (b) False
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Done button: 40 px tall
    Cancel button: 56 px tall
35. 35.True or false: a tiny 20 px button is poor button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Next button: 52 px tall
    Back button: 40 px tall (a) Next (b) Back (c) Send
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Next button: 52 px tall
    Cancel button: 60 px tall (a) Next (b) Cancel (c) Send
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Help button: 48 px tall
    Send button: 48 px tall
    Save button: 44 px tall
39. 39.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Done button: 52 px tall
    Start button: 36 px tall
    Cancel button: 56 px tall (a) Done (b) Cancel (c) Start (d) Back

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