App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 279 · 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. How many of these buttons follow the rule?
   Cancel button: 36 px tall
   Done button: 64 px tall
   Save button: 36 px tall
2. 2.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
3. 3.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 60 px tall
   Send button: 68 px tall
   Save button: 40 px tall (a) Save (b) Send (c) Start
5. 5.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on black (c) dark blue on white (d) white on black
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 32 px tall
   Send button: 32 px tall
   Next button: 60 px tall
7. 7.True or false: icons with no meaning is good button design. (a) False (b) True
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 56 px tall
   Save button: 72 px tall
   Cancel button: 28 px tall (a) Send (b) Cancel (c) Save
9. 9.True or false: a big, easy tap area is poor button design. (a) True (b) False
10. 10.True or false: a clear word like Save is poor button design. (a) True (b) False
11. 11.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Start button: 40 px tall
    Help button: 64 px tall
    Save button: 72 px tall (a) Start (b) Help (c) Save (d) Back
14. 14.True or false: a clear word like Save is good button design. (a) False (b) True
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Next button: 52 px tall
    Start button: 56 px tall (a) Start (b) Next (c) Send
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Done button: 64 px tall
    Start button: 36 px tall
    Save button: 52 px tall
17. 17.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) dark blue on white (d) light grey on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
19. 19.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
20. 20.Which colour pair is hard to read? (a) white on dark green (b) red on green (c) black on yellow (d) white on black
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
22. 22.True or false: grey text on grey is good button design. (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
24. 24.True or false: space between buttons is poor button design. (a) True (b) False
25. 25.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) red on green (d) yellow on white
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
28. 28.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) dark blue on white (d) light grey on white
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Next button: 52 px tall
    Send button: 60 px tall
    Cancel button: 60 px tall (a) Start (b) Cancel (c) Send (d) Next
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Help button: 52 px tall
    Back button: 36 px tall
31. 31.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save 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?
    Cancel button: 52 px tall
    Help button: 36 px tall
    Next button: 32 px tall
    Back button: 56 px tall
35. 35.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Cancel button: 52 px tall
    Start button: 56 px tall
38. 38.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read

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