--- a/runtime/doc/sign.txt
+++ b/runtime/doc/sign.txt
@@ -1,4 +1,4 @@
-*sign.txt*      For Vim version 8.1.  Last change: 2019 Jun 04
+*sign.txt*      For Vim version 8.1.  Last change: 2019 Jul 21
 
 
 		  VIM REFERENCE MANUAL    by Gordon Prieur
@@ -9,6 +9,7 @@ Sign Support Features				*sign-support*
 
 1. Introduction				|sign-intro|
 2. Commands				|sign-commands|
+3. Functions				|sign-functions-details|
 
 {only available when compiled with the |+signs| feature}
 
@@ -344,4 +345,357 @@ See |sign_jump()| for the equivalent Vim
 		Same but jump to the sign in group {group}
 
 
+==============================================================================
+3. Functions					*sign-functions-details*
+
+sign_define({name} [, {dict}])				*sign_define()*
+sign_define({list})
+		Define a new sign named {name} or modify the attributes of an
+		existing sign.  This is similar to the |:sign-define| command.
+
+		Prefix {name} with a unique text to avoid name collisions.
+		There is no {group} like with placing signs.
+
+		The {name} can be a String or a Number.  The optional {dict}
+		argument specifies the sign attributes.  The following values
+		are supported:
+		   icon		full path to the bitmap file for the sign.
+		   linehl	highlight group used for the whole line the
+				sign is placed in.
+		   text		text that is displayed when there is no icon
+				or the GUI is not being used.
+		   texthl	highlight group used for the text item
+
+		If the sign named {name} already exists, then the attributes
+		of the sign are updated.
+
+		The one argument {list} can be used to define a list of signs.
+		Each list item is a dictionary with the above items in {dict}
+		and a 'name' item for the sign name.
+
+		Returns 0 on success and -1 on failure.  When the one argument
+		{list} is used, then returns a List of values one for each
+		defined sign.
+
+		Examples: >
+			call sign_define("mySign", {
+				\ "text" : "=>",
+				\ "texthl" : "Error",
+				\ "linehl" : "Search"})
+			call sign_define([
+				\ {'name' : 'sign1',
+				\  'text' : '=>'},
+				\ {'name' : 'sign2',
+				\  'text' : '!!'}
+				\ ])
+<
+sign_getdefined([{name}])				*sign_getdefined()*
+		Get a list of defined signs and their attributes.
+		This is similar to the |:sign-list| command.
+
+		If the {name} is not supplied, then a list of all the defined
+		signs is returned. Otherwise the attribute of the specified
+		sign is returned.
+
+		Each list item in the returned value is a dictionary with the
+		following entries:
+		   icon		full path to the bitmap file of the sign
+		   linehl	highlight group used for the whole line the
+				sign is placed in.
+		   name		name of the sign
+		   text		text that is displayed when there is no icon
+				or the GUI is not being used.
+		   texthl	highlight group used for the text item
+
+		Returns an empty List if there are no signs and when {name} is
+		not found.
+
+		Examples: >
+			" Get a list of all the defined signs
+			echo sign_getdefined()
+
+			" Get the attribute of the sign named mySign
+			echo sign_getdefined("mySign")
+<
+sign_getplaced([{expr} [, {dict}]])			*sign_getplaced()*
+		Return a list of signs placed in a buffer or all the buffers.
+		This is similar to the |:sign-place-list| command.
+
+		If the optional buffer name {expr} is specified, then only the
+		list of signs placed in that buffer is returned.  For the use
+		of {expr}, see |bufname()|. The optional {dict} can contain
+		the following entries:
+		   group	select only signs in this group
+		   id		select sign with this identifier
+		   lnum		select signs placed in this line. For the use
+				of {lnum}, see |line()|.
+		If {group} is '*', then signs in all the groups including the
+		global group are returned. If {group} is not supplied or is an
+		empty string, then only signs in the global group are
+		returned.  If no arguments are supplied, then signs in the
+		global group placed in all the buffers are returned.
+		See |sign-group|.
+
+		Each list item in the returned value is a dictionary with the
+		following entries:
+			bufnr	number of the buffer with the sign
+			signs	list of signs placed in {bufnr}. Each list
+				item is a dictionary with the below listed
+				entries
+
+		The dictionary for each sign contains the following entries:
+			group	sign group. Set to '' for the global group.
+			id	identifier of the sign
+			lnum	line number where the sign is placed
+			name	name of the defined sign
+			priority	sign priority
+
+		The returned signs in a buffer are ordered by their line
+		number and priority.
+
+		Returns an empty list on failure or if there are no placed
+		signs.
+
+		Examples: >
+			" Get a List of signs placed in eval.c in the
+			" global group
+			echo sign_getplaced("eval.c")
+
+			" Get a List of signs in group 'g1' placed in eval.c
+			echo sign_getplaced("eval.c", {'group' : 'g1'})
+
+			" Get a List of signs placed at line 10 in eval.c
+			echo sign_getplaced("eval.c", {'lnum' : 10})
+
+			" Get sign with identifier 10 placed in a.py
+			echo sign_getplaced("a.py", {'id' : 10})
+
+			" Get sign with id 20 in group 'g1' placed in a.py
+			echo sign_getplaced("a.py", {'group' : 'g1',
+							\  'id' : 20})
+
+			" Get a List of all the placed signs
+			echo sign_getplaced()
+<
+							*sign_jump()*
+sign_jump({id}, {group}, {expr})
+		Open the buffer {expr} or jump to the window that contains
+		{expr} and position the cursor at sign {id} in group {group}.
+		This is similar to the |:sign-jump| command.
+
+		For the use of {expr}, see |bufname()|.
+
+		Returns the line number of the sign. Returns -1 if the
+		arguments are invalid.
+
+		Example: >
+			" Jump to sign 10 in the current buffer
+			call sign_jump(10, '', '')
+<
+
+							*sign_place()*
+sign_place({id}, {group}, {name}, {expr} [, {dict}])
+		Place the sign defined as {name} at line {lnum} in file or
+		buffer {expr} and assign {id} and {group} to sign.  This is
+		similar to the |:sign-place| command.
+
+		If the sign identifier {id} is zero, then a new identifier is
+		allocated.  Otherwise the specified number is used. {group} is
+		the sign group name. To use the global sign group, use an
+		empty string.  {group} functions as a namespace for {id}, thus
+		two groups can use the same IDs. Refer to |sign-identifier|
+		and |sign-group| for more information.
+
+		{name} refers to a defined sign.
+		{expr} refers to a buffer name or number. For the accepted
+		values, see |bufname()|.
+
+		The optional {dict} argument supports the following entries:
+			lnum		line number in the file or buffer
+					{expr} where the sign is to be placed.
+					For the accepted values, see |line()|.
+			priority	priority of the sign. See
+					|sign-priority| for more information.
+
+		If the optional {dict} is not specified, then it modifies the
+		placed sign {id} in group {group} to use the defined sign
+		{name}.
+
+		Returns the sign identifier on success and -1 on failure.
+
+		Examples: >
+			" Place a sign named sign1 with id 5 at line 20 in
+			" buffer json.c
+			call sign_place(5, '', 'sign1', 'json.c',
+							\ {'lnum' : 20})
+
+			" Updates sign 5 in buffer json.c to use sign2
+			call sign_place(5, '', 'sign2', 'json.c')
+
+			" Place a sign named sign3 at line 30 in
+			" buffer json.c with a new identifier
+			let id = sign_place(0, '', 'sign3', 'json.c',
+							\ {'lnum' : 30})
+
+			" Place a sign named sign4 with id 10 in group 'g3'
+			" at line 40 in buffer json.c with priority 90
+			call sign_place(10, 'g3', 'sign4', 'json.c',
+					\ {'lnum' : 40, 'priority' : 90})
+<
+
+							*sign_placelist()*
+sign_placelist({list})
+		Place one or more signs.  This is similar to the
+		|sign_place()| function.  The {list} argument specifies the
+		List of signs to place. Each list item is a dict with the
+		following sign attributes:
+		    buffer	buffer name or number. For the accepted
+				values, see |bufname()|.
+		    group	sign group. {group} functions as a namespace
+				for {id}, thus two groups can use the same
+				IDs. If not specified or set to an empty
+				string, then the global group is used.   See
+				|sign-group| for more information.
+		    id		sign identifier. If not specified or zero,
+				then a new unique identifier is allocated.
+				Otherwise the specified number is used. See
+				|sign-identifier| for more information.
+		    lnum	line number in the buffer {expr} where the
+				sign is to be placed. For the accepted values,
+				see |line()|.
+		    name	name of the sign to place. See |sign_define()|
+		    		for more information.
+		    priority	priority of the sign. When multiple signs are
+				placed on a line, the sign with the highest
+				priority is used. If not specified, the
+				default value of 10 is used. See
+				|sign-priority| for more information.
+
+		If {id} refers to an existing sign, then the existing sign is
+		modified to use the specified {name} and/or {priority}.
+
+		Returns a List of sign identifiers. If failed to place a
+		sign, the corresponding list item is set to -1.
+
+		Examples: >
+			" Place sign s1 with id 5 at line 20 and id 10 at line
+			" 30 in buffer a.c
+			let [n1, n2] = sign_placelist([
+				\ {'id' : 5,
+				\  'name' : 's1',
+				\  'buffer' : 'a.c',
+				\  'lnum' : 20},
+				\ {'id' : 10,
+				\  'name' : 's1',
+				\  'buffer' : 'a.c',
+				\  'lnum' : 30}
+				\ ])
+
+			" Place sign s1 in buffer a.c at line 40 and 50
+			" with auto-generated identifiers
+			let [n1, n2] = sign_placelist([
+				\ {'name' : 's1',
+				\  'buffer' : 'a.c',
+				\  'lnum' : 40},
+				\ {'name' : 's1',
+				\  'buffer' : 'a.c',
+				\  'lnum' : 50}
+				\ ])
+<
+
+sign_undefine([{name}])					*sign_undefine()*
+sign_undefine({list})
+		Deletes a previously defined sign {name}. This is similar to
+		the |:sign-undefine| command. If {name} is not supplied, then
+		deletes all the defined signs.
+
+		The one argument {list} can be used to undefine a list of
+		signs. Each list item is the name of a sign.
+
+		Returns 0 on success and -1 on failure.  For the one argument
+		{list} call, returns a list of values one for each undefined
+		sign.
+
+		Examples: >
+			" Delete a sign named mySign
+			call sign_undefine("mySign")
+
+			" Delete signs 'sign1' and 'sign2'
+			call sign_undefine(["sign1", "sign2"])
+
+			" Delete all the signs
+			call sign_undefine()
+<
+
+sign_unplace({group} [, {dict}])			*sign_unplace()*
+		Remove a previously placed sign in one or more buffers.  This
+		is similar to the |:sign-unplace| command.
+
+		{group} is the sign group name. To use the global sign group,
+		use an empty string.  If {group} is set to '*', then all the
+		groups including the global group are used.
+		The signs in {group} are selected based on the entries in
+		{dict}.  The following optional entries in {dict} are
+		supported:
+			buffer	buffer name or number. See |bufname()|.
+			id	sign identifier
+		If {dict} is not supplied, then all the signs in {group} are
+		removed.
+
+		Returns 0 on success and -1 on failure.
+
+		Examples: >
+			" Remove sign 10 from buffer a.vim
+			call sign_unplace('', {'buffer' : "a.vim", 'id' : 10})
+
+			" Remove sign 20 in group 'g1' from buffer 3
+			call sign_unplace('g1', {'buffer' : 3, 'id' : 20})
+
+			" Remove all the signs in group 'g2' from buffer 10
+			call sign_unplace('g2', {'buffer' : 10})
+
+			" Remove sign 30 in group 'g3' from all the buffers
+			call sign_unplace('g3', {'id' : 30})
+
+			" Remove all the signs placed in buffer 5
+			call sign_unplace('*', {'buffer' : 5})
+
+			" Remove the signs in group 'g4' from all the buffers
+			call sign_unplace('g4')
+
+			" Remove sign 40 from all the buffers
+			call sign_unplace('*', {'id' : 40})
+
+			" Remove all the placed signs from all the buffers
+			call sign_unplace('*')
+<
+sign_unplacelist({list})				*sign_unplacelist()*
+		Remove previously placed signs from one or more buffers.  This
+		is similar to the |sign_unplace()| function.
+
+		The {list} argument specifies the List of signs to remove.
+		Each list item is a dict with the following sign attributes:
+		    buffer	buffer name or number. For the accepted
+				values, see |bufname()|. If not specified,
+				then the specified sign is removed from all
+				the buffers.
+		    group	sign group name. If not specified or set to an
+				empty string, then the global sign group is
+				used. If set to '*', then all the groups
+				including the global group are used.
+		    id		sign identifier. If not specified, then all
+				the signs in the specified group are removed.
+
+		Returns a List where an entry is set to 0 if the corresponding
+		sign was successfully removed or -1 on failure.
+
+		Example: >
+			" Remove sign with id 10 from buffer a.vim and sign
+			" with id 20 from buffer b.vim
+			call sign_unplacelist([
+				\ {'id' : 10, 'buffer' : "a.vim"},
+				\ {'id' : 20, 'buffer' : 'b.vim'},
+				\ ])
+<
+
  vim:tw=78:ts=8:noet:ft=help:norl: