App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 170 · 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.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 36 px tall
   Start button: 40 px tall
   Save button: 32 px tall
   Help button: 64 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 52 px tall
   Start button: 64 px tall
   Next button: 40 px tall
   Send button: 40 px tall
3. 3.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) black on yellow (d) light grey on white
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 44 px tall
   Cancel button: 52 px tall
   Next button: 48 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
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. Which button is too small?
   Save button: 52 px tall
   Cancel button: 64 px tall
   Back button: 32 px tall (a) Back (b) Cancel (c) Save
8. 8.Which colour pair is easy to read? (a) yellow on white (b) black on pale grey (c) dark blue on black (d) light grey on white
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 40 px tall
   Save button: 48 px tall
   Send button: 36 px tall
   Start button: 48 px tall
10. 10.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Done button: 36 px tall
    Back button: 64 px tall
    Start button: 64 px tall
12. 12.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
13. 13.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
14. 14.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Help button: 32 px tall
    Next button: 44 px tall
    Save button: 32 px tall
16. 16.🔘 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
    Help button: 36 px tall
    Send button: 48 px tall
17. 17.True or false: a tiny 20 px button is poor button design. (a) False (b) True
18. 18.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Done button: 48 px tall
    Help button: 64 px tall (a) Save (b) Help (c) Done
20. 20.Which colour pair is hard to read? (a) black on pale grey (b) pale pink on white (c) dark blue on white (d) white on dark green
21. 21.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
22. 22.Which colour pair is easy to read? (a) white on dark green (b) light grey on white (c) dark blue on black (d) pale pink on white
23. 23.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Back button: 40 px tall
    Help button: 36 px tall
26. 26.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
27. 27.Which colour pair is easy to read? (a) red on green (b) white on black (c) pale pink on white (d) light grey on white
28. 28.True or false: a tiny 20 px button is good button design. (a) True (b) False
29. 29.True or false: grey text on grey is poor button design. (a) False (b) True
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Save button: 44 px tall
    Back button: 60 px tall
32. 32.True or false: a clear word like Save is poor button design. (a) False (b) True
33. 33.True or false: a clear word like Save is good button design. (a) False (b) True
34. 34.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.True or false: space between buttons is good button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 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?
    Back button: 60 px tall
    Help button: 52 px tall
    Save button: 40 px tall (a) Save (b) Back (c) Help
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. How many of these buttons follow the rule?
    Help button: 48 px tall
    Start button: 32 px tall
    Save button: 36 px tall
40. 40.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read

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