#Please insert up references in the next lines (line starts with keyword UP)
UP	e4.hlp

#Please insert subtopic references  (line starts with keyword SUB)
SUB	e4_replace.hlp

# Hypertext links in helptext can be added like this: LINK{ref.hlp|http://add|bla@domain}

#************* Title of helpfile !! and start of real helpfile ********

TITLE		ARB_EDIT4 Block Operation

OCCURRENCE	ARB_EDIT4/Block

DESCRIPTION	This menu allows you to perform different block operations.

		All block operations work on what we call 'Highlighted species'.

		To highlight some species use the right mouse button on the 
		name or sequence data of the species/groups. The highlighted
		sequences or sequence ranges will be drawn with a different
		background color (see also LINK{e4_background_priority.hlp}).

		More highlighting functions are available in the first section
		of the Block menu:

		- 'Highlight marked species' highlights all marked species
		- 'De-highlight marked species' removes highlighting from all marked species
		- 'Highlight all' highlights all (loaded) species
		- 'De-highlight all' removes highlighting from all species
		- 'Invert highlighted species' inverts highlighting of all (loaded) species
		- 'Invert group' inverts highlighting of all species in group
		- 'Exchange: Line <-> column' toggles blocktype (see below)


		Use the second section of the block menu to transform "highlighting" into 
		"marking" or vice versa.

		Please consider the difference between the following terms:

		  - Marked species:

                    species marked in ARB_NT

		  - Highlighted species:

                    species highlighted in ARB_EDIT4 using right click

		  - Selected species:

                    species under cursor (see LINK{selected.hlp})

		Several actions (third section of Block menu) can be
		performed on the highlighted block. These actions can be performed
		repeatedly by typing the number of repeats into the editor window
		(check 'Properties/Options/Use digits to repeat edit commands?')

		There are two general types of highlighted blocks:

		- Line blocks include the whole sequence range. To activate a line
		  block first use 'ARB_EDIT4/Block/De-highlight all species' and then right-click
		  on a species name.
		- Column blocks include only a part of the sequence. To
		  activate a column block right-click on the sequence data
                  and move the mouse while keeping the button pressed.

		  
		Add/remove species to/from highlighted:
		[Note that all clicks mentioned below are right clicks!]
			
		- You can add or remove species by clicking on their name.
		- The first click on a group name (or bracket) will highlight all 
		  species contained in the group and the second click will 
		  un-highlight all.

EXAMPLES	None
		
WARNINGS	None

BUGS		None
