App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 374 · 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?
   Save button: 68 px tall
   Send button: 60 px tall
   Cancel button: 48 px tall
   Back button: 44 px tall (a) Back (b) Save (c) Cancel (d) Send
2. 2.Which colour pair is hard to read? (a) red on green (b) black on yellow (c) white on dark green (d) dark blue on white
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 60 px tall
   Cancel button: 40 px tall
   Start button: 52 px tall
   Next button: 52 px tall
4. 4.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 60 px tall
   Start button: 40 px tall
   Cancel button: 40 px tall
   Save button: 48 px tall
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 48 px tall
   Cancel button: 60 px tall
   Back button: 32 px tall
   Save button: 72 px tall (a) Cancel (b) Start (c) Back (d) Save
7. 7.Which colour pair is easy to read? (a) white on black (b) yellow on white (c) dark blue on black (d) red on green
8. 8.True or false: grey text on grey is poor button design. (a) True (b) False
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 68 px tall
   Next button: 28 px tall
   Help button: 64 px tall
   Done button: 68 px tall (a) Save (b) Next (c) Help (d) Done
10. 10.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
12. 12.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Next button: 52 px tall
    Done button: 44 px tall (a) Done (b) Cancel (c) Next
14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Save button: 72 px tall
    Next button: 64 px tall
    Done button: 60 px tall (a) Next (b) Done (c) Send (d) Save
16. 16.True or false: space between buttons is poor button design. (a) False (b) True
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
18. 18.True or false: icons with no meaning is poor button design. (a) False (b) True
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
20. 20.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Back button: 24 px tall
    Start button: 60 px tall (a) Next (b) Start (c) Back
23. 23.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Cancel button: 52 px tall
    Start button: 32 px tall
    Done button: 64 px tall
25. 25.True or false: buttons almost touching is good button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Done button: 68 px tall
    Save button: 32 px tall (a) Next (b) Done (c) Save
27. 27.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
28. 28.True or false: a big, easy tap area is poor button design. (a) True (b) False
29. 29.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.True or false: a tiny 20 px button is good button design. (a) False (b) True
31. 31.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) light grey on white (d) white on black
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
34. 34.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) light grey on white (d) dark blue on black
35. 35.True or false: buttons almost touching is poor button design. (a) False (b) True
36. 36.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
37. 37.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) white on black (d) dark blue on white
38. 38.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.True or false: a clear word like Save is good button design. (a) False (b) True
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Help button: 64 px tall
    Done button: 60 px tall (a) Done (b) Save (c) Help

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