Visual mode: added support for "Transfer Floor Brightness" (210) effect.
Visual mode: added support for "Transfer Ceiling Brightness" (211) effect.
Visual mode: changed the way thing brightness is calculated. Should be closer to GZDoom now.
Sector Edit Form: you can now enter "++" or "--" into "Height Offset" input to raise or lower sectors by their height.
Cosmetic fix in ZDoom_linedefs.cfg.

A couple of cosmetic fixes in ZDoom_linedefs.cfg.

Added, Visual mode, UDMF: added "Change Pitch Clockwise", "Change Pitch Counterclockwise", "Change Roll Clockwise" and "Change Roll Counterclockwise" actions.
Added, Visual mode, UDMF: added "Increase Scale" and "Decrease Scale" actions.
Added, Visual mode, UDMF: "Reset Texture Offsets" action now resets scale when used on things.
Added, Visual mode, UDMF: "Reset Local Texture Offsets" action now resets scale, pitch and roll when used on things.
Changed, Visual mode, UDMF: "Reset Texture Offsets" action now only resets texture offsets (previously it also reset texture scale).
Changed, Visual mode, UDMF: "Reset Local Texture Offsets" action now resets texture offsets, scale and brightness of sidedefs and also rotation of floors/ceilings.
Changed, Visual mode, UDMF: thing box arrow now displays pitch and roll for things, which have attached model and appropriate MODELDEF flags.
Changed, Thing Edit Form, UDMF: negative pitch and roll can now be entered.
Updated documentation.

Updated documentation.

High-DPI: the width of status labels is now scaled to match current DPI settings.
Updated documentation.

Fixed, Linedefs mode, "Make Gradient Brightness" action, UDMF: "lightfog" sidedef flag should be updated when applying the action.

Changed, Linedef Edit form, non-UDMF: reduced window height (on Windows 7 it's 667 -> 639 pixels in Doom map format, 736 -> 698 pixels in Hexen map format).
Added inner highlight on mouse over to ImageSelectorControl.

Fixed, Models, Classic and Visual mode: MODELDEF scale and rotation transforms were applied in incorrect order.
Changed, Visual mode: things with "NOINTERACTION" DECORATE flag can now be rendered above ceiling / below floor.

Fixed, Models, Classic and Visual mode: UDMF scale and rotation transforms were applied in incorrect order.
Fixed, Cosmetic, Script Editor: fixed a typo.
Internal, ImageBrowserControl: removed now unused KeyDown event.
Updated documentation.

Changed, Numeric Textbox: we should not change focus when "usemodifierkeys" is false.

Fixed(?), Texture Browser: possibly fixed Texture Browser not showing up / locking edit forms when current map has a ton of textures (like 2000 or more) in a single texture group.
Internal: replaced CollapsibleSplitter with CollapsibleSplitContainer.

Fixed, Game Configurations window: fixed a crash when manually entering test engine name then choosing it's location.

Fixed(?), Texture Browser: possibly fixed Texture Browser not showing up / locking edit forms when current map has a ton of textures (like 2000 or more) in a single texture group.
Changed, cosmetic, Sector Info panel, Visual mode: info about currently highlighted surface is now shown using different color.
Changed, cosmetic, Linedef Info panel, Visual mode, non-UDMF: texture offset labels for currently highlighted sidedef are now shown using different color.
Changed, cosmetic, Vertex Info panel, UDMF: floor and ceiling offset labels are now grayed out when they have default values.

Fixed, Thing/Linedef/Sector info panels: "Flags" group width was calculated incorrectly when showing the control for the first time.

Fixed, "Make Door" action: highlighted sector should be used as an action target only when there are no sectors selected.
Fixed, "Make Door" action: used textures were not updated after performing the action.

Changed, Numeric textboxes: you can now hold Ctrl or Shift keys while clicking a textbox buttons or using mouse wheel on a textbox to change value increment step.
Changed, Numeric textboxes: trailing zeros are no longer displayed to reduce visual noise.
Fixed, paired numeric controls: in some cases culture-specific decimal separator was not used.
Fixed, map loading: inability to initialize D3D device is now handled a bit more gracefully.
Fixed, main toolbar context menu: we should suppress context menu closing only when user clicks on a menu item while holding Shift key.
Fixed, Game configurations: several Skulltag things were not included in many Zandronum game configurations.

Fixed, Texture Browser: we should not skip items with the same texture name when they belong to different imagegroups.

Fixed, Script Editor, Script names parser, DECORATE actor names parser: in some cases (for example, when entering utter garbage instead of proper acs), parsers could get stuck in an infinite loop...
Updated ZDoom_ACS.cfg.

Fixed, Open Map Option window: a warning message is now displayed when the editor fails to find any maps in the wad being open.
Fixed, Open Map Option window: fixed a crash when switching to a map configuration with long texture names support enabled when the wad being open has no maps (this will probably never happen because of previous change, but let's be on the safe side...).

Added, Internal, Sidedef: LowRequired() and HighRequired() checks now take UDMF slopes into account.
Updated ZDoom ACC.
Updated ZDoom_ACS.cfg.
Updated ZDoom_DECORATE.cfg.

Added, Game configurations: added "thingclasshelp" property. It's used to open a website when thing class name is clicked in the Thing Edit form.
Changed, "Raise/Lower sector to nearest" action: 3d floors are now taken into account when using the action on things.
Updated documentation.

Fixed, Texture Browser: restored Tab key functionality yet again (I broke this in r2248...).
Added a bit of boilerplate to some of Tag Explorer's settings.
Internal: added CollapsibleSplitter control.

Changed, Tag Explorer: several wildcards can now be used at once. For example, entering "#12 $9" will show only map elements with tag 12 and action 9.
Changed, Tag Explorer: you can now filter list by polyobject number by entering "^NN" in the Filter field.
Changed, cosmetic: reduced map resizing caused by UI resizing during map loading.

+ a couple of cosmetic changes.

Removed a bunch of unused build configurations from Builder.sln.

Added, Fit Textures action: the action now takes 3d floor's control side texture offsets into account when used on 3d floor sides.
Updated ZDoom ACC.

Fixed, DB2 bug, Dockers Control: in many cases previously selected tab was not reselected after removing current tab when "Collapse Dockers" setting was enabled.

Fixed, Dockers Control: fixed incorrect control width when showing control for the first time with "Collapse Dockers" setting enabled. 
Internal: MapSet.ConvertSelection no longer selects sectors with no sidedefs when converting selection to sectors (unless those sectors were already selected).

Fixed, Texture Browser form: "All" texture set was always selected when opening the form after closing it with this set selected.
Changed, Texture Browser form: texture groups list can now be resized.
Changed, Texture Browser form: selected group in texture groups list is now highlighted using highlight color even when not focused.
Changed, Linedef Info panel cosmetic: changed vertical position of texture name labels to match with the ones in the Sector Info panel.

Preferences -> Interface: added "Select texture group when opening image browsers" option. When enabled, the group current texture belongs to will be selected when opening image browsers (DB2 behavior). When disabled, "All" texture group will be selected.
Event lines: added event lines for polyobject anchor -> polyobject start spot pairs.
Fixed, Things mode: event lines were not drawn after finishing panning.

Changed, cosmetic: info panel, sidebar and most of the main toolbar buttons are now shown only when a map is loaded.
Fixed, cosmetic: fixed disappearing toolbars separators.

DECORATE parser: added "//$GZDB_SKIP" special comment. Parsing of the file is stopped after this comment is encountered.
Updated documentation.

GLDEFS parser: added "//$GZDB_SKIP" special comment. Parsing of the file is stopped after this comment is encountered.
Updated ZDoom_DECORATE.cfg.

TEXTURES parser: part of a TEXTURES filename is now used as a path in Image Browser. For example, textures from "textures.stuff" will be located in "[TEXTURES]/stuff" in the Image Browser.
TEXTURES parser: added "//$GZDB_SKIP" special comment. Parsing of the file is stopped after this comment is encountered.
Updated documentation.