App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 105 · 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 dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 28 px tall
   Save button: 68 px tall
   Done button: 56 px tall (a) Done (b) Help (c) Save
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 24 px tall
   Start button: 72 px tall
   Save button: 64 px tall
   Next button: 72 px tall (a) Next (b) Save (c) Start (d) Done
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 52 px tall
   Back button: 36 px tall
   Cancel button: 52 px tall (a) Cancel (b) Back (c) Help
7. 7.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 40 px tall
   Done button: 36 px tall
   Cancel button: 36 px tall
   Next button: 32 px tall
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
10. 10.True or false: space between buttons is poor button design. (a) False (b) True
11. 11.True or false: grey text on grey is good button design. (a) False (b) True
12. 12.True or false: icons with no meaning is poor button design. (a) False (b) True
13. 13.True or false: a clear word like Save is good button design. (a) True (b) False
14. 14.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Save button: 68 px tall
    Help button: 52 px tall (a) Save (b) Help (c) Next
16. 16.True or false: buttons almost touching is good button design. (a) True (b) False
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Save button: 56 px tall
    Cancel button: 56 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
19. 19.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) black on yellow (d) light grey on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Save button: 64 px tall
    Help button: 64 px tall (a) Help (b) Save (c) Start
21. 21.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
23. 23.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
24. 24.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
26. 26.True or false: strong colour contrast is good button design. (a) True (b) False
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Start button: 36 px tall
    Send button: 56 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Next button: 48 px tall
    Done button: 32 px tall
    Start button: 60 px tall (a) Help (b) Next (c) Start (d) Done
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Next button: 28 px tall
    Done button: 52 px tall (a) Done (b) Back (c) Next
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Cancel button: 60 px tall
    Next button: 72 px tall
    Save button: 48 px tall (a) Cancel (b) Save (c) Next (d) Start
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Back button: 64 px tall
    Next button: 56 px tall (a) Next (b) Send (c) Back
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.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
35. 35.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
37. 37.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) pale pink on white (d) black on pale grey
38. 38.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) red on green (d) white on dark green
39. 39.True or false: space between buttons is good button design. (a) False (b) True
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?

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