App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 484 · 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?
   Save button: 56 px tall
   Back button: 72 px tall
   Done button: 40 px tall (a) Done (b) Back (c) Save
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 36 px tall
   Next button: 56 px tall
   Help button: 64 px tall
   Send button: 56 px tall
3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
4. 4.True or false: icons with no meaning is poor button design. (a) False (b) True
5. 5.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.True or false: grey text on grey is poor button design. (a) False (b) True
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 40 px tall
   Next button: 52 px tall
   Send button: 60 px tall (a) Done (b) Next (c) Send
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 68 px tall
   Help button: 28 px tall
   Back button: 60 px tall (a) Help (b) Save (c) Back
9. 9.Which colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) white on dark green (d) black on pale grey
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
11. 11.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Next button: 68 px tall
    Help button: 24 px tall
    Start button: 72 px tall (a) Help (b) Start (c) Next (d) Back
13. 13.🌗 Is light grey on white 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?
    Cancel button: 68 px tall
    Done button: 44 px tall
    Back button: 60 px tall (a) Back (b) Cancel (c) Done
15. 15.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) dark blue on white (d) black on pale grey
16. 16.True or false: buttons almost touching is good button design. (a) True (b) False
17. 17.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
18. 18.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.True or false: a tiny 20 px button is good button design. (a) True (b) False
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Done button: 56 px tall
    Start button: 68 px tall
    Cancel button: 44 px tall (a) Done (b) Send (c) Start (d) Cancel
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Back button: 64 px tall
    Next button: 68 px tall
    Help button: 28 px tall (a) Back (b) Help (c) Next (d) Cancel
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Save button: 72 px tall
    Help button: 56 px tall
    Next button: 48 px tall (a) Help (b) Save (c) Next (d) Done
24. 24.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.True or false: a clear word like Save is poor button design. (a) True (b) False
27. 27.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Start button: 60 px tall
    Cancel button: 48 px tall
    Next button: 28 px tall (a) Send (b) Start (c) Next (d) Cancel
29. 29.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Done button: 28 px tall
    Save button: 48 px tall (a) Done (b) Save (c) Back
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Back button: 52 px tall
    Send button: 28 px tall
    Help button: 52 px tall (a) Help (b) Back (c) Save (d) Send
32. 32.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Done button: 36 px tall
    Next button: 72 px tall (a) Start (b) Done (c) Next
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Next button: 56 px tall
    Send button: 68 px tall
    Done button: 24 px tall (a) Send (b) Done (c) Back (d) Next
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
37. 37.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
38. 38.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) white on dark green (d) dark blue on black
39. 39.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?

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