App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 545 · 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.True or false: space between buttons is good button design. (a) False (b) True
2. 2.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 40 px tall
   Help button: 44 px tall
   Send button: 40 px tall
   Save button: 48 px tall
4. 4.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) dark blue on black (d) black on yellow
5. 5.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
6. 6.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on black (d) dark blue on white
7. 7.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
9. 9.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) black on yellow (d) yellow on white
10. 10.🌗 Is black on pale grey 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. Which button is too small?
    Cancel button: 48 px tall
    Next button: 24 px tall
    Send button: 68 px tall (a) Cancel (b) Next (c) Send
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Help button: 48 px tall
    Next button: 36 px tall
    Save button: 48 px tall
13. 13.True or false: a tiny 20 px button is poor button design. (a) False (b) True
14. 14.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Save button: 48 px tall
    Cancel button: 56 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Cancel button: 52 px tall
    Done button: 32 px tall
    Start button: 40 px tall
17. 17.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) light grey on white (d) white on dark green
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Cancel button: 56 px tall
    Start button: 68 px tall (a) Help (b) Start (c) Cancel
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 36 px tall
    Next button: 72 px tall
    Help button: 64 px tall (a) Help (b) Next (c) Start
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Send button: 52 px tall
    Cancel button: 60 px tall
21. 21.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
26. 26.True or false: icons with no meaning is poor button design. (a) False (b) True
27. 27.True or false: grey text on grey is poor button design. (a) False (b) True
28. 28.True or false: a big, easy tap area is poor button design. (a) True (b) False
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
31. 31.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
32. 32.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 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?
    Save button: 60 px tall
    Next button: 32 px tall
    Done button: 56 px tall
    Cancel button: 48 px tall (a) Save (b) Cancel (c) Done (d) Next
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Send button: 64 px tall
    Cancel button: 52 px tall
36. 36.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Save button: 52 px tall
    Done button: 28 px tall (a) Done (b) Cancel (c) Save
38. 38.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Cancel button: 52 px tall
    Next button: 56 px tall
    Back button: 64 px tall
40. 40.Which colour pair is hard to read? (a) black on pale grey (b) red on green (c) white on black (d) white on dark green

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