First of all, this tutorial doesn't edit any of Blizzard's glossary categories, you can check it in screenshots. Hey guys, I've been looking for this for ages and finaly, today, I got it. It is easier than you may think. 1.- Go to Units tab and find your unit's Tech Tree: Glossary Category; change its text key to Unit/Category/Your category's name, in my case (for my new custom map "The Surrendering") it would be Unit/Category/TSZergUnits and in game tooltip (when written the tooltip) would be TS - Zerg. Don't forget to give a number (lower values will show up ahead of higher values) in Tech Tree: Glossary Priority 2.- I couldn't find any otherway of doing this part so: go to Buttons tab and add a new button, it doesn't mind it's name, hotkey... since we will erase it when we are done. On (Basic) UI: Tooltip write on text key this long thing UI/HelpMenuDialogTechGlossary_Control_Unit/Category/YourCategory'sName,so again for me would be UI/HelpMenuDialogTechGlossary_Control_Unit/Category/TSZergUnits and in game tooltip (when written the tooltip) would be TS - Zerg Units. Now hit OK and erase the button. 3.- Go to Text Editor (F8) and find your custom text and make sure they appear as you would like to. 4.- Verify your custom glossary cattegory appear in-game as you would like. See attached pictures for little info. I hope this little post solves some questions. Any questions you have just PM me or post them here.