App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 238 · 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 red on green easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 28 px tall
   Send button: 52 px tall
   Help button: 60 px tall (a) Help (b) Done (c) Send
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 36 px tall
   Save button: 52 px tall
   Help button: 56 px tall
5. 5.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) pale pink on white (d) white on dark green
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 52 px tall
   Cancel button: 48 px tall
   Back button: 28 px tall
   Start button: 48 px tall (a) Save (b) Cancel (c) Back (d) Start
7. 7.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) white on black (d) yellow on white
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 60 px tall
   Next button: 44 px tall
   Done button: 32 px tall
   Start button: 32 px tall
9. 9.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
10. 10.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Send button: 44 px tall
    Save button: 56 px tall
    Back button: 56 px tall (a) Back (b) Save (c) Start (d) Send
12. 12.True or false: grey text on grey is poor button design. (a) False (b) True
13. 13.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) red on green (d) white on black
14. 14.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Back button: 36 px tall
    Save button: 48 px tall (a) Back (b) Cancel (c) Save
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Help button: 72 px tall
    Save button: 28 px tall (a) Send (b) Save (c) Help
18. 18.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.True or false: a big, easy tap area is poor button design. (a) True (b) False
20. 20.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.True or false: grey text on grey is good button design. (a) False (b) True
22. 22.True or false: space between buttons is good button design. (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Help button: 52 px tall
    Save button: 64 px tall
    Start button: 48 px tall (a) Help (b) Save (c) Start (d) Cancel
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
26. 26.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.Which colour pair is easy to read? (a) black on yellow (b) dark blue on black (c) red on green (d) pale pink on white
28. 28.Which colour pair is hard to read? (a) white on black (b) light grey on white (c) black on yellow (d) white on dark green
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: icons with no meaning is good button design. (a) False (b) True
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Done button: 48 px tall
    Next button: 36 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Start button: 60 px tall
    Send button: 40 px tall
    Cancel button: 48 px tall
33. 33.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
35. 35.True or false: a clear word like Save is good button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Back button: 60 px tall
    Start button: 68 px tall (a) Start (b) Help (c) Back
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
38. 38.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 40 px tall
    Cancel button: 68 px tall
    Send button: 60 px tall (a) Send (b) Cancel (c) Help

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