App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 508 · 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. Which button is too small?
   Next button: 72 px tall
   Back button: 64 px tall
   Help button: 36 px tall (a) Back (b) Help (c) Next
2. 2.True or false: a big, easy tap area is poor button design. (a) False (b) True
3. 3.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
4. 4.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 64 px tall
   Start button: 48 px tall
   Send button: 48 px tall
   Help button: 44 px tall (a) Start (b) Send (c) Next (d) Help
6. 6.Which colour pair is hard to read? (a) black on pale grey (b) pale pink on white (c) white on dark green (d) black on yellow
7. 7.Which colour pair is hard to read? (a) light grey on white (b) dark blue on white (c) white on black (d) black on yellow
8. 8.True or false: icons with no meaning is poor button design. (a) True (b) False
9. 9.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) yellow on white (d) black on pale grey
10. 10.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
11. 11.True or false: space between buttons is good button design. (a) False (b) True
12. 12.True or false: buttons almost touching is poor button design. (a) True (b) False
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Help button: 56 px tall
    Cancel button: 48 px tall
    Done button: 36 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Start button: 36 px tall
    Cancel button: 52 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Send button: 44 px tall
    Start button: 48 px tall (a) Send (b) Cancel (c) Start
16. 16.True or false: space between buttons is poor button design. (a) True (b) False
17. 17.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
18. 18.True or false: strong colour contrast is poor button design. (a) False (b) True
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Help button: 32 px tall
    Start button: 68 px tall (a) Start (b) Send (c) Help
20. 20.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.True or false: a tiny 20 px button is good button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Start button: 56 px tall
    Send button: 36 px tall
    Save button: 32 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Done button: 48 px tall
    Save button: 64 px tall (a) Cancel (b) Save (c) Done
24. 24.True or false: buttons almost touching is good button design. (a) False (b) True
25. 25.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
28. 28.True or false: a big, easy tap area is good button design. (a) False (b) True
29. 29.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) yellow on white (d) pale pink on white
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
31. 31.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.Which colour pair is hard to read? (a) red on green (b) white on dark green (c) dark blue on white (d) black on yellow
33. 33.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.Which colour pair is hard to read? (a) dark blue on black (b) white on dark green (c) black on pale grey (d) white on black
35. 35.True or false: grey text on grey is good button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Save button: 24 px tall
    Send button: 72 px tall (a) Start (b) Send (c) Save
38. 38.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Start button: 44 px tall
    Save button: 64 px tall (a) Help (b) Save (c) Start
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Back button: 60 px tall
    Send button: 36 px tall

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