App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 230 · 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 white on black easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 68 px tall
   Done button: 48 px tall
   Start button: 32 px tall
   Help button: 68 px tall (a) Start (b) Help (c) Done (d) Save
3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 48 px tall
   Save button: 52 px tall
   Cancel button: 40 px tall (a) Next (b) Cancel (c) Save
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 56 px tall
   Send button: 36 px tall
   Back button: 68 px tall (a) Start (b) Back (c) Send
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 52 px tall
   Help button: 52 px tall
   Next button: 40 px tall (a) Cancel (b) Help (c) Next
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 32 px tall
   Save button: 64 px tall
   Back button: 36 px tall
8. 8.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 28 px tall
   Done button: 60 px tall
   Start button: 64 px tall (a) Start (b) Done (c) Cancel
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
11. 11.True or false: strong colour contrast is good button design. (a) False (b) True
12. 12.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) red on green (d) white on dark green
13. 13.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) dark blue on black (d) dark blue on white
17. 17.True or false: buttons almost touching is good button design. (a) True (b) False
18. 18.True or false: buttons almost touching is poor button design. (a) False (b) True
19. 19.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) dark blue on black (d) dark blue on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Help button: 60 px tall
    Send button: 52 px tall (a) Send (b) Help (c) Start
21. 21.🌗 Is red on green 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. The Back button is 40 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Cancel button: 48 px tall
    Help button: 68 px tall (a) Cancel (b) Send (c) Help
25. 25.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Help button: 56 px tall
    Next button: 40 px tall (a) Back (b) Next (c) Help
27. 27.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.True or false: a tiny 20 px button is poor button design. (a) False (b) True
29. 29.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.True or false: grey text on grey is good button design. (a) True (b) False
31. 31.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
32. 32.True or false: icons with no meaning is poor button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Send button: 40 px tall
    Next button: 56 px tall
35. 35.True or false: a clear word like Save is good button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Cancel button: 68 px tall
    Send button: 24 px tall
    Done button: 52 px tall (a) Cancel (b) Back (c) Done (d) Send
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Start button: 72 px tall
    Send button: 48 px tall (a) Send (b) Cancel (c) Start
40. 40.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read

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