App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 214 · 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.True or false: grey text on grey is good button design. (a) False (b) True
2. 2.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) white on dark green (d) light grey on white
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
4. 4.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 60 px tall
   Save button: 36 px tall
   Done button: 60 px tall (a) Done (b) Save (c) Send
6. 6.True or false: a tiny 20 px button is good button design. (a) False (b) True
7. 7.True or false: strong colour contrast is poor button design. (a) True (b) False
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 60 px tall
   Save button: 48 px tall
   Back button: 32 px tall
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 72 px tall
   Send button: 72 px tall
   Help button: 28 px tall (a) Next (b) Send (c) Help
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
11. 11.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) pale pink on white (d) yellow on white
13. 13.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
14. 14.True or false: a clear word like Save is good button design. (a) False (b) True
15. 15.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Help button: 52 px tall
    Start button: 60 px tall
    Save button: 36 px tall
18. 18.True or false: grey text on grey 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) pale pink on white (d) white on dark green
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Next button: 36 px tall
    Save button: 48 px tall
    Start button: 56 px tall (a) Next (b) Help (c) Save (d) Start
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Back button: 56 px tall
    Help button: 56 px tall
    Send button: 52 px tall
22. 22.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) dark blue on white (d) pale pink on white
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Save button: 44 px tall
    Back button: 64 px tall
25. 25.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Done button: 44 px tall
    Back button: 60 px tall
    Next button: 48 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
28. 28.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.True or false: a clear word like Save is poor button design. (a) False (b) True
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Next button: 48 px tall
    Send button: 72 px tall
    Cancel button: 28 px tall (a) Cancel (b) Send (c) Done (d) Next
31. 31.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
32. 32.Which colour pair is hard to read? (a) white on black (b) yellow on white (c) dark blue on white (d) black on pale grey
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Next button: 72 px tall
    Help button: 72 px tall
    Done button: 60 px tall (a) Next (b) Back (c) Help (d) Done
34. 34.True or false: buttons almost touching is poor button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
36. 36.True or false: a tiny 20 px button is poor button design. (a) True (b) False
37. 37.True or false: a big, easy tap area is poor button design. (a) False (b) True
38. 38.True or false: space between buttons is poor button design. (a) True (b) False
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Save button: 52 px tall
    Help button: 40 px tall
    Cancel button: 52 px tall (a) Save (b) Done (c) Cancel (d) Help
40. 40.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read

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