2017-09-19
	* v0.31 : ocgx2.sty
	* fix: colour flooding caused by empty links with XeTeX driver and
	`ocgcolorlinks' option

2017-09-14
	* v0.30 : ocgx2.sty
	* v0.11 : ocgbase.sty
	* fix: link size (XeTeX driver) with `ocgcolorlinks' option set;
	OCG switching links in Evince viewer now working; correct listing of
	nested OCGs in layer tree (`Layers' navigation panel in the gui)

2017-06-08
	* v0.29 : ocgx2.sty
	* fix: wrong box number in internal macro, ocgcolorlinks broken for dvips

2017-06-07
	* v0.28 : ocgx2.sty
	* fix: hotfix from v0.27 replaced

2017-06-07
	* v0.27 : ocgx2.sty
	* fix: hotfix to cope with a change of \hbox:n in expl3 [2017/05/13]

2017-05-12
	* v0.26 : ocgx2.sty
	* fix: OCView, OCPrint (ocgcolorlinks related OCGs) settings saved for
	possible re-opening by the user 

2017-04-25
	* v0.25 : ocgx2.sty
	* new:OCG  switching links (\showocg, \hideocg etc.) with hyperref look
	& feel if hyperref is loaded (link border or colorlinks/ocgcolorlinks)

2017-03-30
	* v0.24 : ocgx2.sty
	* fix: \ocglinkprotect{...} messing up the graphics state (CTM)

2017-03-30
	* v0.23 : ocgx2.sty
	* v0.10  : ocgbase.sty
	* fix: nested ocgcolorlinks over multiple pages

2017-03-26
	* v0.22 : ocgx2.sty
	* fix: nested ocgcolorlinks

2017-03-23
	* v0.21 : ocgx2.sty
	* v0.9  : ocgbase.sty
	* fix: error when building document with nested OCGs
	* new: ocgcolorlinks extending over line and page breaks

2017-03-16
	* v0.20 : ocgx2.sty
	* v0.8  : ocgbase.sty
	* fix: compatibility with other pkgs (pdfbase, xsavebox, media9, animate)

2017-03-09
	* v0.19 : ocgx2.sty
	* v0.7  : ocgbase.sty
	* fix: minor code fixes

2017-03-07
	* v0.18 : ocgx2.sty
	* fix: workaround for A-Reader bug when placing OCG switches on OCGs

2016-03-22
	* v0.17 : ocgx2.sty
	* new: option `ocgcolorlinks', enables OCG colour links for hyperref package

2016-03-11
	* v0.16 : ocgx2.sty
	* v0.6 : ocgbase.sty
	* fix: minor adjustments

2016-01-29
	* v0.15 : ocgx2.sty
	* fix: adjusted `atendvi'-related warning message

2015-12-07
	* v0.14 : ocgx2.sty
	* v0.5 : ocgbase.sty
	* fix: `0' and `1' could not be used for setting initial
	visibility; \actionsocg macro caused compilation error when used
	without optional argument

2015-12-03
	* v0.13 : ocgx2.sty
	* fix: bug occasionally creating wrong OCG listing in the layers
	tab of the pdf viewer in connection with nested OCGs
	* new: parameter `opts' added to TikZ style `ocg'

2015-11-26
	* v0.12 : ocgx2.sty
	* v0.4 : ocgbase.sty
	* fix: last argument of `ocg' environment (initial visibility)
	had no effect when re-opening an OCG

2015-11-23
	* v0.11 : ocgx2.sty
	* v0.3 : ocgbase.sty
	* new: PDF layers spanning multiple pages

2015-11-02
	* v0.10 : ocgx2.sty
	* v0.2 : ocgbase.sty
	* new: commands \ocgbase@oc@bdc, \ocgbase_oc_bdc:n and \ocgbase@oc@emc,
	\ocgbase_oc_emc: for marking optional content in content streams

2015-10-28
	* v0.9 : ocgx2.sty
	* v0.1 : ocgbase.sty
	* new: Environment option `radiobtngrp' (adding layers to Radio Button
	Groups), option `showingui' as a synonym for `listintoolbar';
	code restructured for better maintenance (new file ocgbase.sty)

2015-09-11
	* v0.8
	* fix: missing option processing for ocg-p command replacements
	  (\toggleocgs, \showocgs etc.)

2015-07-20
	* v0.7
	* fix: expl3-related adjustments

2015-06-19
	* v0.6a
	* fix: typos fixed

2015-06-18
	* v0.6
	* new: package renamed to `ocgx2'; no more dependency on ocgx and ocg-p
	packages
	* new: options `viewocg', `printocg', `exportocg', `listintoolbar' also
	available as package options
	* new: package-only option `tikz' enables P. Gaborit's `ocgx' TikZ library

2015-06-15
	* v0.5
	* Fix: OCG ID lists with leading/trailings spaces passed as
	argument to the OCG visibilty setting commands caused an error; the same
	with empty arguments.
	Improved behaviour of visibilty setting links that are themselves
	part of OCGs.

2015-03-16
	* v0.4
	* Fix: no more PS specials from `ocg-p.sty' in dvipdfmx mode

2015-03-11
	* v0.3
	* New: ocg environment option `viewocg=always|never|ifvisible' added;
	macro \fxocg@insert@OC allows package authors to insert
	/OC <<OCMD with currently open OCGs>> entries into (suitable) pdf objects,
	i. e. XObjects & Annotations, to make them PDF-layer aware.
	* Fix: dead tikz-generated ocg buttons (from tikzlibraryocgx.code.tex) with
	dvipdfmx/xelatex

2015-01-26
	* v0.2
	* Fix: It was not possible to reference an OCG before defining it.

2015-01-23
	* v0.1
	* New: initial release as `fixocgx'