App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 375 · 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 Next button is 44 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 32 px tall
   Send button: 64 px tall
   Save button: 32 px tall
   Cancel button: 32 px tall
3. 3.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 32 px tall
   Save button: 40 px tall
   Cancel button: 64 px tall
   Help button: 64 px tall
6. 6.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) black on yellow (d) dark blue on white
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 56 px tall
   Start button: 44 px tall
   Cancel button: 60 px tall (a) Start (b) Next (c) Cancel
9. 9.True or false: a big, easy tap area is good button design. (a) False (b) True
10. 10.True or false: grey text on grey is poor button design. (a) False (b) True
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Start button: 44 px tall
    Help button: 52 px tall
    Done button: 68 px tall (a) Start (b) Help (c) Back (d) Done
12. 12.True or false: icons with no meaning is good button design. (a) False (b) True
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Start button: 32 px tall
    Help button: 40 px tall
14. 14.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Done button: 60 px tall
    Cancel button: 56 px tall (a) Done (b) Cancel (c) Save
16. 16.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
17. 17.Which colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) white on dark green (d) dark blue on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Help button: 72 px tall
    Back button: 72 px tall
    Save button: 40 px tall (a) Save (b) Done (c) Back (d) Help
19. 19.True or false: a tiny 20 px button is good button design. (a) True (b) False
20. 20.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Next button: 64 px tall
    Start button: 36 px tall (a) Cancel (b) Next (c) Start
22. 22.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) dark blue on black (d) yellow on white
24. 24.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) pale pink on white (d) white on dark green
25. 25.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) pale pink on white (d) black on pale grey
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Done button: 64 px tall
    Send button: 48 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Next button: 64 px tall
    Send button: 64 px tall
28. 28.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) dark blue on black (d) light grey on white
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Back button: 48 px tall
    Cancel button: 32 px tall (a) Done (b) Cancel (c) Back
30. 30.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Save button: 60 px tall
    Start button: 40 px tall (a) Start (b) Save (c) Back
32. 32.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Cancel button: 72 px tall
    Next button: 32 px tall
    Back button: 68 px tall (a) Start (b) Cancel (c) Next (d) Back
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Cancel button: 32 px tall
    Done button: 56 px tall
    Start button: 64 px tall
35. 35.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) dark blue on white (d) yellow on white
36. 36.True or false: space between buttons is good button design. (a) True (b) False
37. 37.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
38. 38.Which colour pair is hard to read? (a) red on green (b) white on dark green (c) black on pale grey (d) white on black
39. 39.True or false: buttons almost touching is poor button design. (a) True (b) False
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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