App Dev Worksheet: Button Size and Contrast

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

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