App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 353 · 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. The Save button is 32 px tall. How many px taller must it be?
2. 2.Which colour pair is hard to read? (a) red on green (b) dark blue on white (c) black on pale grey (d) white on dark green
3. 3.True or false: a tiny 20 px button is poor button design. (a) True (b) False
4. 4.True or false: grey text on grey is good button design. (a) False (b) True
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 48 px tall
   Save button: 32 px tall
   Start button: 60 px tall
   Back button: 52 px tall (a) Save (b) Done (c) Start (d) Back
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 64 px tall
   Back button: 36 px tall
   Start button: 72 px tall (a) Next (b) Back (c) Start
7. 7.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
8. 8.True or false: space between buttons is good button design. (a) False (b) True
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 32 px tall
   Start button: 60 px tall
   Next button: 48 px tall (a) Start (b) Next (c) Send
10. 10.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Help button: 52 px tall
    Save button: 68 px tall (a) Save (b) Help (c) Next
12. 12.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
13. 13.🌗 Is black on yellow 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. The Help button is 32 px tall. How many px taller must it be?
15. 15.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Send button: 48 px tall
    Start button: 64 px tall
    Save button: 28 px tall (a) Send (b) Next (c) Save (d) Start
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Help button: 36 px tall
    Cancel button: 56 px tall (a) Help (b) Cancel (c) Next
19. 19.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
20. 20.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) white on black (d) pale pink on white
21. 21.True or false: a clear word like Save is poor button design. (a) True (b) False
22. 22.True or false: buttons almost touching is poor button design. (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Done button: 56 px tall
    Next button: 56 px tall (a) Done (b) Next (c) Send
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Back button: 32 px tall
    Help button: 40 px tall
    Start button: 32 px tall
25. 25.True or false: grey text on grey is poor button design. (a) True (b) False
26. 26.True or false: icons with no meaning is poor button design. (a) True (b) False
27. 27.True or false: a big, easy tap area is good button design. (a) False (b) True
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Cancel button: 32 px tall
    Send button: 48 px tall
    Help button: 64 px tall
29. 29.Which colour pair is easy to read? (a) black on pale grey (b) pale pink on white (c) dark blue on black (d) light grey on white
30. 30.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) light grey on white (d) red on green
32. 32.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) white on dark green (d) yellow on white
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Done button: 56 px tall
    Start button: 28 px tall
    Send button: 68 px tall (a) Done (b) Start (c) Help (d) Send
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Next button: 48 px tall
    Send button: 52 px tall (a) Next (b) Send (c) Save
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Back button: 36 px tall
    Next button: 52 px tall
    Send button: 60 px tall
36. 36.True or false: buttons almost touching is good button design. (a) True (b) False
37. 37.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) pale pink on white (d) black on pale grey
38. 38.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
39. 39.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Cancel button: 68 px tall
    Back button: 48 px tall
    Done button: 68 px tall (a) Help (b) Done (c) Back (d) Cancel

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