App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 242 · 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 pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.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
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 36 px tall
   Send button: 72 px tall
   Save button: 48 px tall (a) Send (b) Back (c) Save
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 40 px tall
   Send button: 36 px tall
   Cancel button: 32 px tall
6. 6.True or false: space between buttons is good button design. (a) True (b) False
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. Which button is too small?
   Next button: 52 px tall
   Cancel button: 48 px tall
   Save button: 68 px tall
   Help button: 36 px tall (a) Next (b) Help (c) Cancel (d) Save
9. 9.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Cancel button: 52 px tall
    Help button: 48 px tall
    Send button: 44 px tall
11. 11.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) white on dark green (d) dark blue on black
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
13. 13.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.Which colour pair is hard to read? (a) red on green (b) dark blue on white (c) white on black (d) black on pale grey
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Cancel button: 36 px tall
    Next button: 48 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Back button: 44 px tall
    Save button: 56 px tall
    Send button: 52 px tall
17. 17.True or false: icons with no meaning is poor button design. (a) False (b) True
18. 18.True or false: grey text on grey is good button design. (a) True (b) False
19. 19.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) light grey on white (d) white on black
20. 20.True or false: grey text on grey is poor button design. (a) False (b) True
21. 21.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Cancel button: 64 px tall
    Next button: 72 px tall (a) Cancel (b) Next (c) Save
23. 23.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Back button: 24 px tall
    Done button: 56 px tall (a) Back (b) Done (c) Help
25. 25.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) yellow on white (d) black on yellow
26. 26.True or false: a big, easy tap area is good button design. (a) False (b) True
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Start button: 68 px tall
    Help button: 24 px tall
    Done button: 48 px tall (a) Back (b) Done (c) Help (d) Start
28. 28.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
29. 29.True or false: a clear word like Save is poor button design. (a) False (b) True
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Cancel button: 72 px tall
    Send button: 72 px tall
    Help button: 28 px tall (a) Next (b) Help (c) Send (d) Cancel
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Cancel button: 48 px tall
    Back button: 60 px tall
    Start button: 60 px tall (a) Back (b) Cancel (c) Save (d) Start
34. 34.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Done button: 52 px tall
    Send button: 40 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Next button: 32 px tall
    Send button: 52 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Cancel button: 36 px tall
    Help button: 36 px tall
    Start button: 64 px tall
38. 38.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
40. 40.Which colour pair is easy to read? (a) black on yellow (b) yellow on white (c) light grey on white (d) dark blue on black

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