App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 273 · 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: a big, easy tap area? (a) good design (b) poor design
2. 2.True or false: icons with no meaning is poor button design. (a) True (b) False
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 poor button design. (a) True (b) False
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 68 px tall
   Cancel button: 40 px tall
   Start button: 64 px tall (a) Start (b) Cancel (c) Back
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
7. 7.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 48 px tall
   Save button: 24 px tall
   Start button: 68 px tall
   Send button: 68 px tall (a) Start (b) Send (c) Next (d) Save
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Cancel button: 64 px tall
    Help button: 44 px tall (a) Send (b) Cancel (c) Help
11. 11.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) dark blue on white (d) dark blue on black
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Next button: 40 px tall
    Start button: 52 px tall
    Back button: 40 px tall
14. 14.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
15. 15.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
16. 16.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) white on dark green (d) light grey on white
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
18. 18.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Next button: 32 px tall
    Back button: 36 px tall
20. 20.True or false: icons with no meaning is good button design. (a) False (b) True
21. 21.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
22. 22.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
23. 23.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Next button: 36 px tall
    Start button: 48 px tall
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Help button: 40 px tall
    Done button: 64 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
27. 27.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) dark blue on white (d) light grey on white
29. 29.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Save button: 52 px tall
    Send button: 44 px tall
    Cancel button: 32 px tall
32. 32.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Help button: 32 px tall
    Back button: 48 px tall (a) Next (b) Back (c) Help
34. 34.True or false: strong colour contrast is poor button design. (a) True (b) False
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 Save button is 32 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Cancel button: 36 px tall
    Back button: 36 px tall
    Send button: 64 px tall
38. 38.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Send button: 40 px tall
    Help button: 36 px tall
    Done button: 40 px tall

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