App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 91 · 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?
   Send button: 52 px tall
   Cancel button: 32 px tall
   Done button: 72 px tall (a) Cancel (b) Send (c) Done
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 56 px tall
   Cancel button: 52 px tall
   Done button: 48 px tall
   Send button: 44 px tall
3. 3.True or false: a clear word like Save is good button design. (a) True (b) False
4. 4.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.True or false: buttons almost touching is poor button design. (a) False (b) True
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 48 px tall
   Done button: 32 px tall
   Save button: 32 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 24 px tall
   Save button: 48 px tall
   Start button: 48 px tall
   Cancel button: 72 px tall (a) Start (b) Cancel (c) Help (d) Save
8. 8.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 60 px tall
   Cancel button: 44 px tall
   Save button: 32 px tall
   Done button: 40 px tall
10. 10.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) dark blue on black (d) yellow on white
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Cancel button: 40 px tall
    Next button: 48 px tall
12. 12.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
13. 13.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
15. 15.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) white on dark green (d) light grey on white
16. 16.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
18. 18.True or false: a clear word like Save is poor button design. (a) True (b) False
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Done button: 68 px tall
    Help button: 56 px tall
    Save button: 32 px tall (a) Done (b) Help (c) Save (d) Cancel
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Send button: 60 px tall
    Save button: 72 px tall
    Help button: 40 px tall (a) Send (b) Back (c) Help (d) Save
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Cancel button: 48 px tall
    Save button: 44 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
23. 23.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) light grey on white (d) dark blue on black
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
25. 25.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Save button: 40 px tall
    Next button: 48 px tall (a) Save (b) Cancel (c) Next
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Cancel button: 52 px tall
    Help button: 28 px tall
    Start button: 60 px tall (a) Cancel (b) Help (c) Start (d) Send
28. 28.True or false: a big, easy tap area is good button design. (a) False (b) True
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Send button: 48 px tall
    Back button: 48 px tall (a) Send (b) Cancel (c) Back
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Start button: 60 px tall
    Cancel button: 40 px tall
31. 31.True or false: a tiny 20 px button is good button design. (a) True (b) False
32. 32.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) yellow on white (d) white on black
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
36. 36.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Save button: 44 px tall
    Back button: 44 px tall
    Done button: 64 px tall
39. 39.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) black on pale grey (d) dark blue on black
40. 40.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design

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