App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 216 · 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. The Next button is 20 px tall. How many px taller must it be?
2. 2.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Is this good or poor button design: a clear word like Save? (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?
   Send button: 60 px tall
   Save button: 60 px tall
   Done button: 36 px tall
   Cancel button: 56 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 48 px tall
   Next button: 60 px tall
   Cancel button: 32 px tall (a) Cancel (b) Next (c) Save
6. 6.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) white on dark green (d) pale pink on white
7. 7.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
8. 8.🌗 Is white on dark green 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. How many of these buttons follow the rule?
   Help button: 36 px tall
   Send button: 60 px tall
   Done button: 40 px tall
   Start button: 48 px tall
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Back button: 52 px tall
    Cancel button: 56 px tall
11. 11.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Send button: 60 px tall
    Done button: 48 px tall
    Start button: 52 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Back button: 64 px tall
    Cancel button: 48 px tall
15. 15.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
16. 16.Which colour pair is hard to read? (a) white on black (b) pale pink on white (c) white on dark green (d) black on pale grey
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Start button: 72 px tall
    Send button: 72 px tall
    Cancel button: 68 px tall (a) Done (b) Cancel (c) Send (d) Start
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
20. 20.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) dark blue on white (d) black on pale grey
21. 21.True or false: icons with no meaning is poor button design. (a) False (b) True
22. 22.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
23. 23.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) light grey on white (d) dark blue on black
24. 24.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) black on pale grey (d) dark blue on white
25. 25.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Save button: 60 px tall
    Cancel button: 36 px tall (a) Back (b) Save (c) Cancel
27. 27.Which colour pair is easy to read? (a) yellow on white (b) white on black (c) light grey on white (d) pale pink on white
28. 28.True or false: buttons almost touching is good button design. (a) True (b) False
29. 29.True or false: grey text on grey is good button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
31. 31.Which colour pair is hard to read? (a) white on black (b) dark blue on black (c) black on pale grey (d) dark blue on white
32. 32.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.True or false: a big, easy tap area is poor button design. (a) True (b) False
34. 34.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.True or false: a big, easy tap area is good button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
37. 37.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Done button: 56 px tall
    Back button: 48 px tall (a) Done (b) Help (c) Back
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Cancel button: 28 px tall
    Save button: 72 px tall
    Send button: 72 px tall (a) Done (b) Save (c) Send (d) Cancel

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