App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 225 · 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 black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 44 px tall
   Help button: 52 px tall
   Done button: 60 px tall
3. 3.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) red on green (d) light grey on white
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 64 px tall
   Done button: 44 px tall
   Start button: 64 px tall
   Send button: 52 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 60 px tall
   Next button: 52 px tall
   Send button: 28 px tall
   Cancel button: 56 px tall (a) Send (b) Next (c) Cancel (d) Save
6. 6.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) light grey on white (d) black on yellow
7. 7.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
8. 8.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.True or false: buttons almost touching is poor button design. (a) True (b) False
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Next button: 24 px tall
    Save button: 64 px tall (a) Next (b) Send (c) Save
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
13. 13.True or false: a tiny 20 px button is good button design. (a) True (b) False
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 36 px tall
    Send button: 60 px tall
    Help button: 72 px tall (a) Send (b) Help (c) Start
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Help button: 32 px tall
    Next button: 32 px tall
    Start button: 60 px tall
17. 17.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
18. 18.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
19. 19.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.True or false: buttons almost touching is good button design. (a) True (b) False
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Save button: 64 px tall
    Back button: 48 px tall (a) Save (b) Back (c) Done
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Start button: 52 px tall
    Back button: 36 px tall (a) Next (b) Back (c) Start
23. 23.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) black on pale grey (d) dark blue on black
24. 24.True or false: a big, easy tap area is good button design. (a) True (b) False
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
28. 28.True or false: a big, easy tap area is poor button design. (a) False (b) True
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Send button: 64 px tall
    Start button: 48 px tall
    Help button: 60 px tall
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Done button: 32 px tall
    Send button: 56 px tall
    Back button: 48 px tall
31. 31.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
33. 33.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) white on black (d) pale pink on white
34. 34.True or false: grey text on grey is good button design. (a) False (b) True
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Cancel button: 64 px tall
    Send button: 28 px tall
    Save button: 48 px tall (a) Save (b) Send (c) Cancel (d) Next
36. 36.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) yellow on white (d) black on yellow
37. 37.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) red on green (d) black on pale grey
38. 38.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🌗 Is red on green 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. Which button is too small?
    Help button: 60 px tall
    Start button: 48 px tall
    Next button: 28 px tall
    Cancel button: 64 px tall (a) Help (b) Start (c) Cancel (d) Next

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