This plugin allows you to move objects around in Studio using hotkeys. The default hotkeys are Y for moving on X axis, U for Y axis, and I for Z axis. You can also use these hotkeys for rotation and scaling as well. When scaling, you can also use T to scale along all axes at once.
Studio has built in hotkeys for switching between move/rotate/scale mode, W/E/R keys respectively. Using these together with this plugin's hot keys allows you to very rapidly position objects.
Plugin hotkeys can be configured in the Plugin Settings menu found by pressing F1 in game.
Extract the zip to your game folder
AI version for AI Girl, KK version for Koikatsu