need to move intellisense popup window in visual studio code

change width

For adjusting the width, you can drag the right side of the window now, see this SO post for an old animation.

On mac the right of the popup will turn blue when hovered (cursor isn't captured in screenshot) and can be resized. You can also resize vertically by hovering the bottom. It looks like this on mac (not sure about other OS):

change position

The new version (October 2021 (version 1.62)) makes it easy to move the position... sort of. You can now choose to have the editor above or below what you hover. So glad they added it as a feature. This wasn't exactly the problem you had, but when I first searched for moving the intellisense menu, it led me here, so figured I'd add this for others Google sends here.

Simply add the following to settings.json file:

"editor.hover.above": false

Add a comma after it if you have more settings below it:

"editor.hover.above": false,
"editor.minimap.enabled": false

You can try to configure intellisense within VScode using the steps in https://code.visualstudio.com/docs/editor/intellisense#_customizing-intellisense, though I am not sure if your particular issue could be solved this way.