As far as jEdit is concerned, “paragraphs” are delimited by double newlines. This is also how TeX defines a paragraph. Note that jEdit doesn't parse HTML files for “<P>” tags, nor does it support paragraphs delimited only by a leading indent.
C+UP
and C+DOWN
move the caret to the previous and next paragraph, respectively.
Holding down Shift
in addition to the above
extends the selection a paragraph at a time.
Edit>More Selection>Select
Paragraph (shortcut: C+e p
)
selects the paragraph containing the caret.
Edit>Text>Format
Paragraph (shortcut: C+e f
) splits and joins lines in the current
selection to make it fit within the wrap column position. If nothing is selected, the paragraph containing the caret is formatted instead. See
the section called “Wrapping Long Lines” for information and word wrap and
changing the wrap column.
Edit>Text>Delete
Paragraph (shortcut: C+e d
)
deletes the paragraph containing the caret.