Here goes part of the patch notes related to the Game Master mode

Game v3.0.150.188

Game Master mode
- Updated music tab. Added new music and fixed several playback issues

- Added support for multi-region levels in GM mode:
-- If level contains several region triggers buttons will appear on minimap allowing to switch between them

- You can now drag items with or without snapping to terrain (by pressing the Caps Lock button)

- Fixed inconsistency when spawning and dragging an existing item

- Fix for characters sometimes not being assigned to anyone when a player disconnects from a GM session

- Fixed error 300 and error 302 issues and related crash when trying to load zones that had a global entity removed

- Fixed not being able to see custom stats tab when playing with controller

- Fixed a crash related to NPCs joining dialog

- Fixed a crash related to duplicate characters not being cleared correctly

- Fixed a crash when dragging certain items to inventory

- Fixed AI type panel and Alignment context menu not closing when GM changes character

- Fixed an issue causing the encounter panel to display characters in the wrong order if there is a global character

- GMs are now able to change the layout of add- ons for savegames (active sessions), as well as add new add- ons for already ongoing sessions

- Fixed player character being teleported incorrectly when GM takes item that player was sitting or lying on

- Users no longer lose Action Points when the GM manages their items during combat

- Fixed exported characters not having the correct skills memorized

- Fixed item use state being broken after GM has moved it to his inventory and back into the world

- Fixed peace mode after saving and loading

- Fixed cancel button in Level Templates search field

- Fixed swapping around items not being synced correctly to clients
- Fixed being able to load a pin with a deleted scene

- Fixed Character Sheet background after managing a Character

- Fixed incorrect tier of items being generated for creatures

- Fixed GM not being able to do a GM roll during combat when possessing a character


Mods
- Fixed an issue with downloading add-ons from the host when entering a multiplayer game

- Fixed a possible global entity duplication issue when downloading an add-on into an existing campaign

- New items in mods now get added to an existing savegame if the savegame already contained the mod and the mod is of a newer version than the version in the savegame

- Mods now get loaded after the lobby screen in order to avoid players having to download mods just to enter the lobby (for Campaign and Game Master)

- Fixed mod downloading and uploading errors due to incorrect renaming of mod files

- Players can now load add-ons when loading a savegame:
-- There is "Gear" icon appears when selecting a savegame of GM session allowing to change mods added to the game.


More info here

Game Hotfix v3.0.150.760

Game Master mode

- Fixed crash related to loading savegames with mods enabled.

- Fixed incorrect installation path for updating workshop mods.

- Fixed missing context menu in Overview Map after deleting a folder in some cases.

- Fixed monsters not being able to attack when player gives them any weapon in weapon slot.

- Tooltips are now displayed correctly for inventory when possessing a creature.

- Fixed crash caused when an addon introducing statuses is removed/turned off.

More info here

Game v3.0.158.595

Game Master mode
- Added an option via the in-game menu to re-roll the party while already in a campaign

- Players can now join the session during party re-roll

- Added a Reputation Management screen to set NPC attitudes towards the players

- Added a keyboard shortcut (Caps Lock) to make movable objects parallel to the surface, tilting them

- Added a warning message when disabling mods during a GM session

- Fixed Magical Armor and Physical armor values after possessing a creature

- Fixed Make War option not working in GM mode

- Fixed a crash related to the GM character not being assigned to a player

- Fixed GM being able to load a level when players have not finished preparing their characters

- Fixed players being blocked on the Character Creation screen when reconnecting

- Fixed incorrect alignment of NPCs if GM possesses them during combat, then saves and loads

- Fixed Context menu when right-clicking on stickies in the Vignette window

- Fixed visual of characters being dragged by the GM

- Fixed an issue that would, when an object was being moved, automatically make it assume a position parallel to the ground, resulting in it being tilted.

- Fixed an interface issue if a character has no memorized skills

- Fixed white icons in the Encounter panel

- Fixed not being able to select items from the Encounter panel under certain conditions

- Fixed skill cooldowns during pause

- Fixed a crash related to selecting an origin character with certain mods activated

- Fixed a crash when holding right-shift and dragging a character

- Fixed clients not being able to download images larger than 1Mb

- Disabled Trade Context menu for dead NPCs

- Disabled NPCs incorrectly receiving XP when a GM possesses them

More info here

Game Hotfix v3.0.159.021

Game Master mode

- Fixed context menu in GM character management panel

More info here

Game v3.0.168.526

Game Master mode
- GM can now set XP gained from monsters

- Fixed Character sheet tabs after possessing a creature

- Fixed a crash on clients that do not have a character assigned during GM rolls

- Fixed a crash related to the host having certain mods enabled (like Bard and Artificer classes)

- Fixed several issues with scrollbars not appearing correctly

- Fixed camera position when double clicking on an item in the GM’s item sheet

- Fixed a blocking issue related to disabling add-ons and loading saves related to that mod

- Fixed GM being able to invite players while still in prepare mode

- Fixed stats for items that are increased in level through the Item Sheet. Their stats are now properly adjusted to their level

- Fixed surfaces dealing incorrect amount of damage when placed by GM

Game v3.0.180.158

Game Master mode
- Added Game Master Journal feature: allows the GM to plan a campaign with notes and descriptions of events. This is not visible to the player.

- You can now make a copy of a scene

- Introduced "level lock" mode on spawn monsters panel! Mode automatically scales spawned creatures/item to selected level

- Fixed a possible crash when clicking on certain campaigns in the Campaign List window

- Fixed a crash related to changing atmosphere several times

- Fixed items spawned by GM being unidentified by default

- Fixed selection issue in vignette on client side for players using a controller

- Fixed character position issue when host loads a scene from a mod and then disables the mod

- Fixed deactivated characters not being visible when gm does a party reroll

- Fixed items not being tagged as “unidentified” to players, even though the
GM specifically made items to be like this

- Fixed broken characters when doing a party reroll and having players in splitscreen reconnect

- Fixed GM not being able to use Vignettes after using travel function on the overview map

- Fixed players with controllers being able to choose vignette answers before they are published

- Fixed vignette text that is displayed for players using a controller

- Fixed the combat log for the GM after doing an initial possess of the same creature

- Fixed Edit Skillset Sheet being broken after party reroll if the GM gane a player more than 12 skills of the same school

- Fixed available skills for several creature types (several had too many by default)

- Fixed GM not being able to drag and drop items from the ground onto creatures

- Fixed hotbar being active on the overview map screen when using a controller

- Skills dragged onto NPC’s no longer require that NPC to have free memory slots

- Equipment now scales with characters changed by the GM (not for players)

- Fixed UI buttons overlapping text

- GM can now create unidentified items

- Player can use combat log in global pause mode

- Fixed game crashing when loading a savegame made with an addon after removing that addon

- Fixed rare issues with dead and joining characters during party reroll

- Fixed some creature portraits

- Fixed overview map blocking when travelling with a sticky on it

More info here

Game v3.0.226.993

Game Master mode
- Fixed Medusa head giving wings instead of snakes

- Fixed a bug where selected talents of creatures were blocked or removed after saving and loading

- Fixed a bug where NPCs could lose assigned abilities and talents

- Player can no longer send a party invitation to a possessed creature, which broke the GM's inventory

- Custom GM adventures now allow GM add-ons

- GM can now set lockpick level

- GM or possessed creature should not see game shroud

- Skills given by GM are now in the correct section

- Skills given by GM can now be unlearned

- Fixed items taken from creatures being marked as stolen