App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 184 · 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: a tiny 20 px button is good button design. (a) True (b) False
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 24 px tall
   Help button: 72 px tall
   Send button: 52 px tall (a) Back (b) Help (c) Send
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 32 px tall
   Next button: 32 px tall
   Back button: 36 px tall
   Help button: 60 px tall
4. 4.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) black on yellow (d) light grey on white
5. 5.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 56 px tall
   Help button: 48 px tall
   Save button: 64 px tall
   Done button: 32 px tall (a) Start (b) Save (c) Done (d) Help
8. 8.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) white on dark green (d) light grey on white
9. 9.True or false: a big, easy tap area is poor button design. (a) True (b) False
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
11. 11.True or false: buttons almost touching is good button design. (a) True (b) False
12. 12.True or false: a tiny 20 px button is poor button design. (a) True (b) False
13. 13.True or false: a big, easy tap area is good button design. (a) False (b) True
14. 14.Which colour pair is hard to read? (a) dark blue on white (b) red on green (c) white on dark green (d) black on yellow
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 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?
    Next button: 60 px tall
    Help button: 72 px tall
    Done button: 64 px tall
    Back button: 28 px tall (a) Done (b) Help (c) Next (d) Back
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Back button: 68 px tall
    Save button: 48 px tall
    Help button: 56 px tall (a) Next (b) Save (c) Back (d) Help
18. 18.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
19. 19.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
21. 21.True or false: strong colour contrast is poor button design. (a) True (b) False
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Next button: 32 px tall
    Save button: 32 px tall
    Cancel button: 64 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
25. 25.True or false: grey text on grey is good button design. (a) True (b) False
26. 26.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on black (d) black on yellow
27. 27.Which colour pair is hard to read? (a) dark blue on white (b) dark blue on black (c) black on yellow (d) black on pale grey
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
29. 29.True or false: strong colour contrast is good button design. (a) False (b) True
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Cancel button: 52 px tall
    Help button: 52 px tall
    Send button: 68 px tall (a) Cancel (b) Help (c) Send (d) Save
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Back button: 36 px tall
    Cancel button: 56 px tall
    Help button: 44 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Send button: 68 px tall
    Help button: 28 px tall
    Next button: 64 px tall (a) Start (b) Help (c) Send (d) Next
33. 33.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Start button: 32 px tall
    Done button: 32 px tall
36. 36.Which colour pair is easy to read? (a) red on green (b) white on black (c) light grey on white (d) pale pink on white
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Send button: 60 px tall
    Start button: 24 px tall (a) Save (b) Start (c) Send
38. 38.True or false: space between buttons is poor button design. (a) False (b) True
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
40. 40.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) pale pink on white (d) dark blue on black

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