App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 638 · 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 this good or poor button design: grey text on grey? (a) good design (b) poor design
2. 2.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 52 px tall
   Back button: 32 px tall
   Send button: 68 px tall (a) Back (b) Done (c) Send
4. 4.Which colour pair is hard to read? (a) red on green (b) white on black (c) white on dark green (d) black on yellow
5. 5.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) black on yellow (d) yellow on white
6. 6.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
7. 7.True or false: icons with no meaning is good button design. (a) False (b) True
8. 8.True or false: space between buttons is poor button design. (a) True (b) False
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 64 px tall
   Start button: 64 px tall
   Save button: 24 px tall
   Done button: 56 px tall (a) Start (b) Done (c) Save (d) Cancel
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
11. 11.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
13. 13.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.True or false: a clear word like Save is poor button design. (a) True (b) False
15. 15.True or false: a big, easy tap area is good button design. (a) True (b) False
16. 16.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
17. 17.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) yellow on white (d) dark blue on black
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Cancel button: 48 px tall
    Send button: 28 px tall (a) Help (b) Cancel (c) Send
19. 19.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
20. 20.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Next button: 48 px tall
    Back button: 48 px tall
22. 22.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Cancel button: 48 px tall
    Back button: 44 px tall
    Save button: 60 px tall (a) Done (b) Back (c) Save (d) Cancel
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Help button: 64 px tall
    Start button: 48 px tall
    Send button: 56 px tall
25. 25.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Done button: 36 px tall
    Send button: 32 px tall
    Cancel button: 32 px tall
27. 27.True or false: a tiny 20 px button is good button design. (a) False (b) True
28. 28.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) light grey on white (d) black on pale grey
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Help button: 52 px tall
    Save button: 28 px tall
    Cancel button: 48 px tall (a) Start (b) Save (c) Cancel (d) Help
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Send button: 64 px tall
    Help button: 40 px tall (a) Send (b) Help (c) Save
31. 31.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Next button: 36 px tall
    Back button: 64 px tall
    Save button: 64 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Done button: 24 px tall
    Start button: 52 px tall (a) Done (b) Help (c) Start
35. 35.Which colour pair is hard to read? (a) pale pink on white (b) black on yellow (c) white on black (d) dark blue on white
36. 36.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) white on black (d) white on dark green
37. 37.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Cancel button: 48 px tall
    Start button: 56 px tall
    Back button: 48 px tall
39. 39.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) white on dark green (d) dark blue on black
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Next button: 52 px tall
    Back button: 68 px tall (a) Back (b) Next (c) Send

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