App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 202 · 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: icons with no meaning is poor button design. (a) False (b) True
2. 2.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 32 px tall
   Help button: 72 px tall
   Save button: 48 px tall
   Cancel button: 72 px tall (a) Cancel (b) Help (c) Save (d) Back
4. 4.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 56 px tall
   Next button: 52 px tall
   Start button: 64 px tall
   Save button: 32 px tall (a) Start (b) Save (c) Next (d) Cancel
6. 6.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 68 px tall
   Cancel button: 48 px tall
   Done button: 36 px tall (a) Cancel (b) Done (c) Help
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
9. 9.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 black
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Done button: 72 px tall
    Start button: 72 px tall
    Next button: 28 px tall (a) Next (b) Done (c) Back (d) Start
11. 11.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) yellow on white (d) black on yellow
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Cancel button: 36 px tall
    Done button: 60 px tall
13. 13.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) pale pink on white (d) red on green
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Start button: 36 px tall
    Back button: 64 px tall (a) Save (b) Start (c) Back
16. 16.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
19. 19.Which colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) black on pale grey (d) white on black
20. 20.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
22. 22.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Help button: 60 px tall
    Start button: 60 px tall
    Save button: 32 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Send button: 56 px tall
    Back button: 60 px tall
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Help button: 40 px tall
    Back button: 60 px tall
26. 26.Which colour pair is hard to read? (a) yellow on white (b) white on dark green (c) dark blue on white (d) black on pale grey
27. 27.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) white on dark green (d) black on yellow
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 36 px tall
    Cancel button: 52 px tall
    Back button: 60 px tall
    Next button: 48 px tall (a) Next (b) Help (c) Back (d) Cancel
29. 29.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
30. 30.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Help button: 60 px tall
    Cancel button: 60 px tall (a) Start (b) Cancel (c) Help
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
33. 33.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) yellow on white (d) black on pale grey
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Cancel button: 40 px tall
    Start button: 72 px tall (a) Start (b) Cancel (c) Done
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
36. 36.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Help button: 52 px tall
    Cancel button: 40 px tall
38. 38.🌗 Is pale pink 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. Which button is too small?
    Start button: 64 px tall
    Cancel button: 68 px tall
    Send button: 48 px tall
    Back button: 24 px tall (a) Back (b) Send (c) Cancel (d) Start
40. 40.True or false: space between buttons is poor button design. (a) False (b) True

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