App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 378 · 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.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on black (d) white on black
2. 2.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
3. 3.Which colour pair is easy to read? (a) yellow on white (b) white on black (c) light grey on white (d) dark blue on black
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
5. 5.True or false: grey text on grey is poor button design. (a) True (b) False
6. 6.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) red on green (d) light grey on white
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 36 px tall
   Back button: 36 px tall
   Next button: 32 px tall
   Cancel button: 56 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 40 px tall
   Save button: 56 px tall
   Next button: 52 px tall (a) Next (b) Cancel (c) Save
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
10. 10.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) red on green (d) dark blue on white
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Cancel button: 56 px tall
    Back button: 36 px tall
    Start button: 44 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Done button: 28 px tall
    Cancel button: 72 px tall
    Next button: 60 px tall (a) Cancel (b) Done (c) Next (d) Help
13. 13.True or false: space between buttons is poor button design. (a) True (b) False
14. 14.True or false: space between buttons is good button design. (a) False (b) True
15. 15.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
17. 17.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.True or false: icons with no meaning is poor button design. (a) False (b) True
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Send button: 32 px tall
    Done button: 56 px tall
    Cancel button: 68 px tall (a) Cancel (b) Done (c) Back (d) Send
20. 20.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) pale pink on white (d) black on pale grey
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
22. 22.True or false: a tiny 20 px button is good button design. (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Back button: 24 px tall
    Cancel button: 48 px tall (a) Send (b) Back (c) Cancel
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Done button: 32 px tall
    Save button: 52 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Save button: 64 px tall
    Start button: 56 px tall
    Done button: 44 px tall (a) Help (b) Start (c) Save (d) Done
28. 28.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) yellow on white (d) dark blue on black
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
30. 30.True or false: icons with no meaning is good button design. (a) False (b) True
31. 31.True or false: a big, easy tap area is good button design. (a) True (b) False
32. 32.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Help button: 36 px tall
    Next button: 64 px tall (a) Done (b) Next (c) Help
35. 35.True or false: a clear word like Save is poor button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
38. 38.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Send button: 64 px tall
    Start button: 24 px tall (a) Done (b) Send (c) Start
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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