App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 59 · 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. The Help button is 28 px tall. How many px taller must it be?
2. 2.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
3. 3.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
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. The Cancel button is 28 px tall. How many px taller must it be?
6. 6.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 52 px tall
   Help button: 64 px tall
   Back button: 48 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 36 px tall
   Start button: 36 px tall
   Save button: 52 px tall
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
10. 10.True or false: buttons almost touching is poor button design. (a) False (b) True
11. 11.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
14. 14.True or false: a clear word like Save is good button design. (a) False (b) True
15. 15.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) pale pink on white (d) yellow on white
16. 16.🌗 Is dark blue on white 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: grey text on grey? (a) poor design (b) good design
18. 18.Which colour pair is hard to read? (a) dark blue on white (b) light grey on white (c) white on dark green (d) black on yellow
19. 19.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) white on dark green (d) light grey on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Done button: 36 px tall
    Send button: 32 px tall
21. 21.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🌗 Is black on pale grey 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. Which button is too small?
    Cancel button: 48 px tall
    Done button: 56 px tall
    Back button: 44 px tall (a) Back (b) Cancel (c) Done
25. 25.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) dark blue on black (d) black on yellow
28. 28.True or false: strong colour contrast is good button design. (a) True (b) False
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Start button: 32 px tall
    Next button: 60 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Done button: 48 px tall
    Help button: 60 px tall
    Save button: 44 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Start button: 56 px tall
    Help button: 64 px tall
    Done button: 64 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
34. 34.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) black on yellow (d) black on pale grey
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
38. 38.True or false: grey text on grey is poor button design. (a) True (b) False
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Cancel button: 56 px tall
    Start button: 48 px tall (a) Cancel (b) Done (c) Start
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Next button: 68 px tall
    Start button: 48 px tall (a) Start (b) Save (c) Next

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