App Dev Worksheet: Button Size and Contrast

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

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