App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 622 · 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: a clear word like Save? (a) poor design (b) good design
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 56 px tall
   Help button: 24 px tall
   Next button: 68 px tall (a) Cancel (b) Next (c) Help
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
4. 4.True or false: a tiny 20 px button is good button design. (a) False (b) True
5. 5.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
6. 6.True or false: grey text on grey is poor button design. (a) True (b) False
7. 7.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
8. 8.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
9. 9.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on black (d) black on pale grey
10. 10.True or false: a clear word like Save is poor button design. (a) False (b) True
11. 11.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) red on green
12. 12.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) dark blue on black (d) black on yellow
13. 13.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) dark blue on white (d) light grey on white
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Start button: 56 px tall
    Save button: 36 px tall
    Send button: 36 px tall
15. 15.True or false: a big, easy tap area is good button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Cancel button: 56 px tall
    Next button: 56 px tall
    Save button: 64 px tall
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Start button: 32 px tall
    Send button: 48 px tall (a) Done (b) Send (c) Start
18. 18.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) white on black (d) yellow on white
19. 19.True or false: grey text on grey is good button design. (a) True (b) False
20. 20.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) white on black (d) black on pale grey
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
22. 22.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Back button: 36 px tall
    Next button: 52 px tall (a) Next (b) Back (c) Start
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
25. 25.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
26. 26.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Next button: 36 px tall
    Send button: 44 px tall
    Start button: 56 px tall
28. 28.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) dark blue on white (d) pale pink on white
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Cancel button: 32 px tall
    Save button: 64 px tall (a) Save (b) Cancel (c) Start
30. 30.True or false: buttons almost touching is good button design. (a) True (b) False
31. 31.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Next button: 56 px tall
    Cancel button: 24 px tall (a) Next (b) Back (c) Cancel
33. 33.True or false: strong colour contrast is good button design. (a) False (b) True
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
35. 35.True or false: strong colour contrast is poor button design. (a) True (b) False
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.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Start button: 32 px tall
    Help button: 32 px tall
    Done button: 56 px tall
39. 39.True or false: a big, easy tap area is poor button design. (a) False (b) True
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Help button: 48 px tall
    Done button: 28 px tall
    Cancel button: 64 px tall (a) Help (b) Done (c) Cancel (d) Save

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