App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 196 · 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 Send button is 28 px tall. How many px taller must it be?
2. 2.True or false: a clear word like Save is poor button design. (a) False (b) True
3. 3.True or false: a big, easy tap area is poor button design. (a) False (b) True
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 68 px tall
   Done button: 32 px tall
   Start button: 52 px tall
   Help button: 52 px tall (a) Done (b) Start (c) Save (d) Help
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 40 px tall
   Save button: 60 px tall
   Done button: 48 px tall
6. 6.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
7. 7.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
8. 8.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.Which colour pair is easy to read? (a) black on pale grey (b) dark blue on black (c) yellow on white (d) pale pink on white
11. 11.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Start button: 64 px tall
    Done button: 44 px tall (a) Start (b) Done (c) Send
13. 13.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) white on dark green (d) black on pale grey
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Send button: 36 px tall
    Start button: 64 px tall
    Cancel button: 64 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Send button: 60 px tall
    Save button: 24 px tall (a) Next (b) Send (c) Save
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
18. 18.Which colour pair is hard to read? (a) red on green (b) white on dark green (c) white on black (d) black on pale grey
19. 19.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
20. 20.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) red on green (d) black on yellow
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Help button: 36 px tall
    Save button: 32 px tall
22. 22.True or false: grey text on grey is good button design. (a) True (b) False
23. 23.True or false: a tiny 20 px button is poor button design. (a) True (b) False
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Back button: 24 px tall
    Send button: 60 px tall
    Start button: 52 px tall (a) Save (b) Start (c) Send (d) Back
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Start button: 32 px tall
    Cancel button: 36 px tall
26. 26.Which colour pair is easy to read? (a) white on dark green (b) light grey on white (c) yellow on white (d) dark blue on black
27. 27.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) white on black (d) dark blue on white
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Send button: 60 px tall
    Help button: 48 px tall (a) Send (b) Help (c) Back
29. 29.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
30. 30.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) white on black (d) black on yellow
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Start button: 32 px tall
    Send button: 60 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Next button: 52 px tall
    Save button: 52 px tall
    Start button: 36 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Cancel button: 64 px tall
    Next button: 40 px tall
    Back button: 48 px tall (a) Cancel (b) Next (c) Back (d) Done
37. 37.True or false: a big, easy tap area is good button design. (a) True (b) False
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Cancel button: 52 px tall
    Back button: 56 px tall (a) Back (b) Done (c) Cancel
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Cancel button: 48 px tall
    Help button: 64 px tall

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