App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 65 · 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. Which button is too small?
   Help button: 60 px tall
   Done button: 52 px tall
   Cancel button: 68 px tall
   Next button: 40 px tall (a) Next (b) Help (c) Done (d) Cancel
2. 2.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 40 px tall
   Done button: 48 px tall
   Cancel button: 56 px tall
4. 4.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.True or false: buttons almost touching is good button design. (a) True (b) False
6. 6.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 52 px tall
   Cancel button: 56 px tall
   Back button: 32 px tall
   Help button: 64 px tall
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Back button: 32 px tall
    Done button: 44 px tall
    Help button: 60 px tall
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Save button: 64 px tall
    Send button: 44 px tall
    Help button: 52 px tall
12. 12.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) red on green (d) light grey on white
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Save button: 52 px tall
    Send button: 48 px tall (a) Send (b) Cancel (c) Save
15. 15.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
16. 16.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Start button: 32 px tall
    Next button: 64 px tall
18. 18.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) pale pink on white (d) black on yellow
19. 19.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
20. 20.Which colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) white on dark green (d) white on black
21. 21.True or false: grey text on grey is poor button design. (a) True (b) False
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Done button: 72 px tall
    Send button: 56 px tall (a) Next (b) Done (c) Send
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
24. 24.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) yellow on white (d) white on dark green
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Next button: 52 px tall
    Back button: 32 px tall (a) Back (b) Next (c) Save
26. 26.🌗 Is white on dark green 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. Which button is too small?
    Help button: 32 px tall
    Back button: 72 px tall
    Done button: 64 px tall (a) Done (b) Help (c) Back
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Start button: 24 px tall
    Save button: 64 px tall (a) Send (b) Start (c) Save
30. 30.True or false: a big, easy tap area is poor button design. (a) False (b) True
31. 31.True or false: space between buttons is good button design. (a) False (b) True
32. 32.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) white on black (d) light grey on white
33. 33.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) dark blue on black (d) black on pale grey
34. 34.Which colour pair is easy to read? (a) white on dark green (b) dark blue on black (c) red on green (d) light grey on white
35. 35.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) white on black (d) dark blue on black
36. 36.True or false: a tiny 20 px button is poor button design. (a) False (b) True
37. 37.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Next button: 36 px tall
    Start button: 72 px tall
    Help button: 64 px tall (a) Help (b) Done (c) Start (d) Next
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Cancel button: 32 px tall
    Done button: 48 px tall (a) Next (b) Done (c) Cancel
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?

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