App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 552 · 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 this good or poor button design: grey text on grey? (a) good design (b) poor design
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 52 px tall
   Done button: 64 px tall
   Next button: 36 px tall
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 36 px tall
   Help button: 64 px tall
   Done button: 32 px tall
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 52 px tall
   Help button: 60 px tall
   Send button: 36 px tall
   Next button: 52 px tall (a) Save (b) Next (c) Send (d) Help
5. 5.True or false: space between buttons is poor button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 52 px tall
   Send button: 24 px tall
   Help button: 68 px tall
   Cancel button: 72 px tall (a) Back (b) Cancel (c) Send (d) Help
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
8. 8.True or false: icons with no meaning is good button design. (a) True (b) False
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
10. 10.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Done button: 72 px tall
    Start button: 72 px tall (a) Save (b) Done (c) Start
12. 12.Which colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) white on dark green (d) dark blue on white
13. 13.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) red on green (d) white on dark green
14. 14.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) light grey on white (d) black on pale grey
15. 15.🌗 Is white on dark green 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. Which button is too small?
    Done button: 24 px tall
    Send button: 60 px tall
    Save button: 48 px tall
    Start button: 60 px tall (a) Done (b) Send (c) Start (d) Save
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Done button: 52 px tall
    Help button: 56 px tall
    Start button: 44 px tall
18. 18.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
19. 19.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) light grey on white (d) black on yellow
20. 20.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
22. 22.True or false: a tiny 20 px button is poor button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Next button: 72 px tall
    Help button: 44 px tall (a) Next (b) Help (c) Cancel
24. 24.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) black on yellow (d) black on pale grey
25. 25.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) white on dark green (d) pale pink on white
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Save button: 56 px tall
    Help button: 52 px tall (a) Help (b) Save (c) Send
27. 27.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.True or false: space between buttons is good button design. (a) False (b) True
29. 29.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
31. 31.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.True or false: a clear word like Save is good button design. (a) False (b) True
33. 33.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Help button: 68 px tall
    Save button: 64 px tall (a) Save (b) Next (c) Help
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.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Cancel button: 52 px tall
    Back button: 56 px tall
    Next button: 64 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Done button: 28 px tall
    Cancel button: 56 px tall
    Back button: 68 px tall (a) Done (b) Cancel (c) Back (d) Send
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
39. 39.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Cancel button: 56 px tall
    Next button: 36 px tall
    Save button: 36 px tall

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