If you desire text to be rendered in the Times New Roman typeface then in the source view of the editor enclose that text between these two HTML tags which define an inline style: <span style="font-size: 12pt; font-family: "Times New Roman","serif";">This text will be rendered in Times typeface.</span>.
From just below this sentence down to the horizontal line has been pasted from MS Word using the "Paste from Word" button with both options unchecked (Ignore Font Face definitions and Remove Styles definitions).
Here is a left justified sentence with a word in RED, the typeface is Times New Roman 12 pt. The sentence continues (in Bold just now) and continues and continues (in Italics just now) and continues so we can see what happens when a left justified paragraph is longer than one line.
Here is a new paragraph in 16 pt. type.
Here is a new paragraph in 8 pt. type.
Following is a blank line.
Here is an indented paragraph with a word in BLUE, the typeface is Arial 12 pt. The sentence continues (in Bold just now) and continues and continues (in Italics just now) and continues so we can see what happens when an indented paragraph is longer than one line. Following is a new indented paragraph (no blank line).
This is the second indented paragraph. Following is a blank line.
The type face is back to Times New Roman. Following is a table (no blank line).
The next cell is empty
The previous cell is empty
· Bulleted list first item, the line above is blank.
· Second item
· The third item is longer than one line because I just kept typing nonsense until it seemed there was enough to go over one line.
· Fourth item
No blank line after bulleted list.
The list above was a bulleted list in Word but after pasting is just text and dots (HTML: ·).
The insertion of the inline style defining the Times New Roman typeface is inconsistent with much of the text which was Times in the Word document rendered in Arial after pasting. However a page that I pasted from Word (the page of basic instructions) had only Times typeface and was rendered correctly and entirely in Times.
Below is a demo of typing in the Plone 3 editor and then applying Style and Format. Not pasted from MS Word.
Text Style Small Font
Text Style Normal Size Font
Text Style Large Font
Text Style X-Large Font
Text Style Discreet Text
Text Format Heading 2.
Text Format Heading 3.
Text Format Heading 4.
Text Format Heading 5.