--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -1582,7 +1582,7 @@
 -xrm	gui_x11.txt	/*-xrm*
 -y	starting.txt	/*-y*
 .	repeat.txt	/*.*
-...	eval.txt	/*...*
+...	userfunc.txt	/*...*
 .Xdefaults	gui_x11.txt	/*.Xdefaults*
 .aff	spell.txt	/*.aff*
 .dic	spell.txt	/*.dic*
@@ -2260,8 +2260,8 @@ 90.5	usr_90.txt	/*90.5*
 :caddfile	quickfix.txt	/*:caddfile*
 :caf	quickfix.txt	/*:caf*
 :cafter	quickfix.txt	/*:cafter*
-:cal	eval.txt	/*:cal*
-:call	eval.txt	/*:call*
+:cal	userfunc.txt	/*:cal*
+:call	userfunc.txt	/*:call*
 :cat	eval.txt	/*:cat*
 :catch	eval.txt	/*:catch*
 :cb	quickfix.txt	/*:cb*
@@ -2405,13 +2405,14 @@ 90.5	usr_90.txt	/*90.5*
 :def	vim9.txt	/*:def*
 :defc	vim9.txt	/*:defc*
 :defcompile	vim9.txt	/*:defcompile*
+:defer	userfunc.txt	/*:defer*
 :del	change.txt	/*:del*
 :delc	map.txt	/*:delc*
 :delcommand	map.txt	/*:delcommand*
 :delcr	todo.txt	/*:delcr*
 :delete	change.txt	/*:delete*
-:delf	eval.txt	/*:delf*
-:delfunction	eval.txt	/*:delfunction*
+:delf	userfunc.txt	/*:delf*
+:delfunction	userfunc.txt	/*:delfunction*
 :delm	motion.txt	/*:delm*
 :delmarks	motion.txt	/*:delmarks*
 :di	change.txt	/*:di*
@@ -2488,10 +2489,10 @@ 90.5	usr_90.txt	/*90.5*
 :endclass	vim9.txt	/*:endclass*
 :enddef	vim9.txt	/*:enddef*
 :endenum	vim9.txt	/*:endenum*
-:endf	eval.txt	/*:endf*
+:endf	userfunc.txt	/*:endf*
 :endfo	eval.txt	/*:endfo*
 :endfor	eval.txt	/*:endfor*
-:endfunction	eval.txt	/*:endfunction*
+:endfunction	userfunc.txt	/*:endfunction*
 :endif	eval.txt	/*:endif*
 :endinterface	vim9.txt	/*:endinterface*
 :endt	eval.txt	/*:endt*
@@ -2553,13 +2554,13 @@ 90.5	usr_90.txt	/*90.5*
 :foldo	fold.txt	/*:foldo*
 :foldopen	fold.txt	/*:foldopen*
 :for	eval.txt	/*:for*
-:fu	eval.txt	/*:fu*
-:func-abort	eval.txt	/*:func-abort*
-:func-closure	eval.txt	/*:func-closure*
-:func-dict	eval.txt	/*:func-dict*
-:func-range	eval.txt	/*:func-range*
-:function	eval.txt	/*:function*
-:function-verbose	eval.txt	/*:function-verbose*
+:fu	userfunc.txt	/*:fu*
+:func-abort	userfunc.txt	/*:func-abort*
+:func-closure	userfunc.txt	/*:func-closure*
+:func-dict	userfunc.txt	/*:func-dict*
+:func-range	userfunc.txt	/*:func-range*
+:function	userfunc.txt	/*:function*
+:function-verbose	userfunc.txt	/*:function-verbose*
 :g	repeat.txt	/*:g*
 :global	repeat.txt	/*:global*
 :go	motion.txt	/*:go*
@@ -2599,6 +2600,8 @@ 90.5	usr_90.txt	/*90.5*
 :his	cmdline.txt	/*:his*
 :history	cmdline.txt	/*:history*
 :history-indexing	cmdline.txt	/*:history-indexing*
+:hor	windows.txt	/*:hor*
+:horizontal	windows.txt	/*:horizontal*
 :i	insert.txt	/*:i*
 :ia	map.txt	/*:ia*
 :iabbrev	map.txt	/*:iabbrev*
@@ -3049,8 +3052,8 @@ 90.5	usr_90.txt	/*90.5*
 :ret	change.txt	/*:ret*
 :retab	change.txt	/*:retab*
 :retab!	change.txt	/*:retab!*
-:retu	eval.txt	/*:retu*
-:return	eval.txt	/*:return*
+:retu	userfunc.txt	/*:retu*
+:return	userfunc.txt	/*:return*
 :rew	editing.txt	/*:rew*
 :rewind	editing.txt	/*:rewind*
 :ri	change.txt	/*:ri*
@@ -4078,7 +4081,7 @@ E1066	vim9.txt	/*E1066*
 E1067	eval.txt	/*E1067*
 E1068	vim9.txt	/*E1068*
 E1069	vim9.txt	/*E1069*
-E107	eval.txt	/*E107*
+E107	userfunc.txt	/*E107*
 E1071	vim9.txt	/*E1071*
 E1072	eval.txt	/*E1072*
 E1073	vim9.txt	/*E1073*
@@ -4093,18 +4096,18 @@ E1080	vim9.txt	/*E1080*
 E1081	eval.txt	/*E1081*
 E1082	vim9.txt	/*E1082*
 E1083	editing.txt	/*E1083*
-E1084	eval.txt	/*E1084*
+E1084	userfunc.txt	/*E1084*
 E1085	eval.txt	/*E1085*
 E1087	vim9.txt	/*E1087*
 E1088	vim9.txt	/*E1088*
 E1089	eval.txt	/*E1089*
 E109	eval.txt	/*E109*
-E1090	eval.txt	/*E1090*
+E1090	userfunc.txt	/*E1090*
 E1091	vim9.txt	/*E1091*
 E1092	various.txt	/*E1092*
 E1093	eval.txt	/*E1093*
 E1094	vim9.txt	/*E1094*
-E1095	eval.txt	/*E1095*
+E1095	userfunc.txt	/*E1095*
 E1096	vim9.txt	/*E1096*
 E1097	vim9.txt	/*E1097*
 E1098	eval.txt	/*E1098*
@@ -4167,7 +4170,7 @@ E1148	eval.txt	/*E1148*
 E1149	vim9.txt	/*E1149*
 E115	eval.txt	/*E115*
 E1150	vim9.txt	/*E1150*
-E1151	eval.txt	/*E1151*
+E1151	userfunc.txt	/*E1151*
 E1152	vim9.txt	/*E1152*
 E1153	eval.txt	/*E1153*
 E1154	eval.txt	/*E1154*
@@ -4187,7 +4190,7 @@ E1166	eval.txt	/*E1166*
 E1167	vim9.txt	/*E1167*
 E1168	vim9.txt	/*E1168*
 E1169	eval.txt	/*E1169*
-E117	eval.txt	/*E117*
+E117	userfunc.txt	/*E117*
 E1170	vim9.txt	/*E1170*
 E1171	vim9.txt	/*E1171*
 E1172	vim9.txt	/*E1172*
@@ -4243,7 +4246,7 @@ E1216	builtin.txt	/*E1216*
 E1217	vim9.txt	/*E1217*
 E1218	vim9.txt	/*E1218*
 E1219	vim9.txt	/*E1219*
-E122	eval.txt	/*E122*
+E122	userfunc.txt	/*E122*
 E1220	vim9.txt	/*E1220*
 E1221	vim9.txt	/*E1221*
 E1222	vim9.txt	/*E1222*
@@ -4254,7 +4257,7 @@ E1226	vim9.txt	/*E1226*
 E1227	vim9.txt	/*E1227*
 E1228	vim9.txt	/*E1228*
 E1229	eval.txt	/*E1229*
-E123	eval.txt	/*E123*
+E123	userfunc.txt	/*E123*
 E1230	options.txt	/*E1230*
 E1231	map.txt	/*E1231*
 E1232	builtin.txt	/*E1232*
@@ -4264,7 +4267,7 @@ E1236	vim9.txt	/*E1236*
 E1237	map.txt	/*E1237*
 E1238	vim9.txt	/*E1238*
 E1239	builtin.txt	/*E1239*
-E124	eval.txt	/*E124*
+E124	userfunc.txt	/*E124*
 E1240	change.txt	/*E1240*
 E1241	change.txt	/*E1241*
 E1242	change.txt	/*E1242*
@@ -4275,7 +4278,7 @@ E1246	eval.txt	/*E1246*
 E1247	cmdline.txt	/*E1247*
 E1248	vim9.txt	/*E1248*
 E1249	syntax.txt	/*E1249*
-E125	eval.txt	/*E125*
+E125	userfunc.txt	/*E125*
 E1250	vim9.txt	/*E1250*
 E1251	vim9.txt	/*E1251*
 E1252	vim9.txt	/*E1252*
@@ -4286,18 +4289,18 @@ E1256	vim9.txt	/*E1256*
 E1257	vim9.txt	/*E1257*
 E1258	vim9.txt	/*E1258*
 E1259	vim9.txt	/*E1259*
-E126	eval.txt	/*E126*
+E126	userfunc.txt	/*E126*
 E1260	vim9.txt	/*E1260*
 E1261	vim9.txt	/*E1261*
 E1262	vim9.txt	/*E1262*
-E1263	eval.txt	/*E1263*
+E1263	userfunc.txt	/*E1263*
 E1264	vim9.txt	/*E1264*
 E1265	eval.txt	/*E1265*
 E1266	if_pyth.txt	/*E1266*
-E1267	eval.txt	/*E1267*
+E1267	userfunc.txt	/*E1267*
 E1268	vim9.txt	/*E1268*
 E1269	vim9.txt	/*E1269*
-E127	eval.txt	/*E127*
+E127	userfunc.txt	/*E127*
 E1270	change.txt	/*E1270*
 E1271	vim9.txt	/*E1271*
 E1272	vim9.txt	/*E1272*
@@ -4308,7 +4311,7 @@ E1276	builtin.txt	/*E1276*
 E1277	channel.txt	/*E1277*
 E1278	eval.txt	/*E1278*
 E1279	eval.txt	/*E1279*
-E128	eval.txt	/*E128*
+E128	userfunc.txt	/*E128*
 E1280	spell.txt	/*E1280*
 E1281	pattern.txt	/*E1281*
 E1282	eval.txt	/*E1282*
@@ -4319,7 +4322,7 @@ E1286	builtin.txt	/*E1286*
 E1287	builtin.txt	/*E1287*
 E1288	builtin.txt	/*E1288*
 E1289	builtin.txt	/*E1289*
-E129	eval.txt	/*E129*
+E129	userfunc.txt	/*E129*
 E1290	change.txt	/*E1290*
 E1291	testing.txt	/*E1291*
 E1292	cmdline.txt	/*E1292*
@@ -4328,10 +4331,11 @@ E1294	textprop.txt	/*E1294*
 E1295	textprop.txt	/*E1295*
 E1296	textprop.txt	/*E1296*
 E1297	vim9.txt	/*E1297*
+E1298	vim9.txt	/*E1298*
 E13	message.txt	/*E13*
-E131	eval.txt	/*E131*
-E132	eval.txt	/*E132*
-E133	eval.txt	/*E133*
+E131	userfunc.txt	/*E131*
+E132	userfunc.txt	/*E132*
+E133	userfunc.txt	/*E133*
 E134	change.txt	/*E134*
 E135	autocmd.txt	/*E135*
 E136	starting.txt	/*E136*
@@ -4396,7 +4400,7 @@ E19	message.txt	/*E19*
 E190	message.txt	/*E190*
 E191	motion.txt	/*E191*
 E192	message.txt	/*E192*
-E193	eval.txt	/*E193*
+E193	userfunc.txt	/*E193*
 E194	message.txt	/*E194*
 E195	starting.txt	/*E195*
 E196	various.txt	/*E196*
@@ -4675,7 +4679,7 @@ E450	popup.txt	/*E450*
 E451	eval.txt	/*E451*
 E452	eval.txt	/*E452*
 E453	syntax.txt	/*E453*
-E454	eval.txt	/*E454*
+E454	userfunc.txt	/*E454*
 E455	print.txt	/*E455*
 E456	print.txt	/*E456*
 E457	print.txt	/*E457*
@@ -4978,13 +4982,13 @@ E737	builtin.txt	/*E737*
 E738	eval.txt	/*E738*
 E739	builtin.txt	/*E739*
 E74	message.txt	/*E74*
-E740	eval.txt	/*E740*
+E740	userfunc.txt	/*E740*
 E741	eval.txt	/*E741*
-E742	eval.txt	/*E742*
+E742	userfunc.txt	/*E742*
 E743	eval.txt	/*E743*
 E744	netbeans.txt	/*E744*
 E745	eval.txt	/*E745*
-E746	eval.txt	/*E746*
+E746	userfunc.txt	/*E746*
 E747	editing.txt	/*E747*
 E748	repeat.txt	/*E748*
 E749	various.txt	/*E749*
@@ -5101,7 +5105,7 @@ E85	options.txt	/*E85*
 E850	change.txt	/*E850*
 E851	gui_x11.txt	/*E851*
 E852	gui_x11.txt	/*E852*
-E853	eval.txt	/*E853*
+E853	userfunc.txt	/*E853*
 E854	options.txt	/*E854*
 E855	autocmd.txt	/*E855*
 E856	testing.txt	/*E856*
@@ -5135,7 +5139,7 @@ E880	if_pyth.txt	/*E880*
 E881	autocmd.txt	/*E881*
 E882	builtin.txt	/*E882*
 E883	builtin.txt	/*E883*
-E884	eval.txt	/*E884*
+E884	userfunc.txt	/*E884*
 E885	sign.txt	/*E885*
 E886	starting.txt	/*E886*
 E887	if_pyth.txt	/*E887*
@@ -5188,8 +5192,8 @@ E929	starting.txt	/*E929*
 E93	windows.txt	/*E93*
 E930	builtin.txt	/*E930*
 E931	message.txt	/*E931*
-E932	eval.txt	/*E932*
-E933	eval.txt	/*E933*
+E932	userfunc.txt	/*E932*
+E933	userfunc.txt	/*E933*
 E934	sign.txt	/*E934*
 E935	builtin.txt	/*E935*
 E936	autocmd.txt	/*E936*
@@ -5250,7 +5254,7 @@ E985	eval.txt	/*E985*
 E986	tagsrch.txt	/*E986*
 E987	tagsrch.txt	/*E987*
 E988	gui_w32.txt	/*E988*
-E989	eval.txt	/*E989*
+E989	userfunc.txt	/*E989*
 E99	diff.txt	/*E99*
 E990	eval.txt	/*E990*
 E991	eval.txt	/*E991*
@@ -5572,7 +5576,7 @@ W18	syntax.txt	/*W18*
 W19	autocmd.txt	/*W19*
 W20	if_pyth.txt	/*W20*
 W21	if_pyth.txt	/*W21*
-W22	eval.txt	/*W22*
+W22	userfunc.txt	/*W22*
 WORD	motion.txt	/*WORD*
 WSL	os_win32.txt	/*WSL*
 WWW	intro.txt	/*WWW*
@@ -5707,12 +5711,12 @@ a'	motion.txt	/*a'*
 a(	motion.txt	/*a(*
 a)	motion.txt	/*a)*
 a4	print.txt	/*a4*
-a:0	eval.txt	/*a:0*
-a:000	eval.txt	/*a:000*
-a:1	eval.txt	/*a:1*
-a:firstline	eval.txt	/*a:firstline*
-a:lastline	eval.txt	/*a:lastline*
-a:var	eval.txt	/*a:var*
+a:0	userfunc.txt	/*a:0*
+a:000	userfunc.txt	/*a:000*
+a:1	userfunc.txt	/*a:1*
+a:firstline	userfunc.txt	/*a:firstline*
+a:lastline	userfunc.txt	/*a:lastline*
+a:var	userfunc.txt	/*a:var*
 a<	motion.txt	/*a<*
 a>	motion.txt	/*a>*
 aB	motion.txt	/*aB*
@@ -5858,8 +5862,8 @@ autocommand-events	autocmd.txt	/*autocom
 autocommand-pattern	autocmd.txt	/*autocommand-pattern*
 autocommands	autocmd.txt	/*autocommands*
 autoformat	change.txt	/*autoformat*
-autoload	eval.txt	/*autoload*
-autoload-functions	eval.txt	/*autoload-functions*
+autoload	userfunc.txt	/*autoload*
+autoload-functions	userfunc.txt	/*autoload-functions*
 avoid-hit-enter	version5.txt	/*avoid-hit-enter*
 aw	motion.txt	/*aw*
 a{	motion.txt	/*a{*
@@ -6493,6 +6497,7 @@ decada_members	ft_ada.txt	/*decada_membe
 deepcopy()	builtin.txt	/*deepcopy()*
 defaults.vim	starting.txt	/*defaults.vim*
 defaults.vim-explained	usr_05.txt	/*defaults.vim-explained*
+define-function	userfunc.txt	/*define-function*
 definition-search	tagsrch.txt	/*definition-search*
 definitions	intro.txt	/*definitions*
 delete()	builtin.txt	/*delete()*
@@ -7131,11 +7136,11 @@ ftplugins	usr_05.txt	/*ftplugins*
 fullcommand()	builtin.txt	/*fullcommand()*
 funcref()	builtin.txt	/*funcref()*
 function()	builtin.txt	/*function()*
-function-argument	eval.txt	/*function-argument*
+function-argument	userfunc.txt	/*function-argument*
 function-key	intro.txt	/*function-key*
 function-list	usr_41.txt	/*function-list*
-function-range-example	eval.txt	/*function-range-example*
-function-search-undo	eval.txt	/*function-search-undo*
+function-range-example	userfunc.txt	/*function-range-example*
+function-search-undo	userfunc.txt	/*function-search-undo*
 function_key	intro.txt	/*function_key*
 functions	eval.txt	/*functions*
 fuzzy-matching	pattern.txt	/*fuzzy-matching*
@@ -8182,10 +8187,10 @@ lnum-variable	eval.txt	/*lnum-variable*
 load-plugins	starting.txt	/*load-plugins*
 load-vim-script	repeat.txt	/*load-vim-script*
 local-additions	help.txt	/*local-additions*
-local-function	eval.txt	/*local-function*
+local-function	userfunc.txt	/*local-function*
 local-options	options.txt	/*local-options*
 local-variable	eval.txt	/*local-variable*
-local-variables	eval.txt	/*local-variables*
+local-variables	userfunc.txt	/*local-variables*
 local_markfilelist	pi_netrw.txt	/*local_markfilelist*
 locale	mbyte.txt	/*locale*
 locale-name	mbyte.txt	/*locale-name*
@@ -8797,7 +8802,7 @@ no_plugin_maps	filetype.txt	/*no_plugin_
 nocombine	syntax.txt	/*nocombine*
 non-greedy	pattern.txt	/*non-greedy*
 non-zero-arg	eval.txt	/*non-zero-arg*
-none-function_argument	eval.txt	/*none-function_argument*
+none-function_argument	userfunc.txt	/*none-function_argument*
 none-variable	eval.txt	/*none-variable*
 normal-index	index.txt	/*normal-index*
 not-compatible	usr_01.txt	/*not-compatible*
@@ -8851,7 +8856,7 @@ option-value-function	options.txt	/*opti
 option-window	options.txt	/*option-window*
 option_restore()	todo.txt	/*option_restore()*
 option_save()	todo.txt	/*option_save()*
-optional-function-argument	eval.txt	/*optional-function-argument*
+optional-function-argument	userfunc.txt	/*optional-function-argument*
 options	options.txt	/*options*
 options-changed	version5.txt	/*options-changed*
 options-in-terminal	terminal.txt	/*options-in-terminal*
@@ -10326,6 +10331,7 @@ user-cmd-ambiguous	map.txt	/*user-cmd-am
 user-commands	map.txt	/*user-commands*
 user-functions	eval.txt	/*user-functions*
 user-manual	usr_toc.txt	/*user-manual*
+userfunc.txt	userfunc.txt	/*userfunc.txt*
 using-<Plug>	usr_51.txt	/*using-<Plug>*
 using-menus	gui.txt	/*using-menus*
 using-scripts	repeat.txt	/*using-scripts*