I want to use these symbols in a text document.
Make sure the option menu View > Toolbars > Drawing is checked. Then you should see a drawing toolbar at the bottom of the Window. Click on a tool and then click into the document and drag while holding down the mouse button. For style and position use the context menu (=right click) of the object.
If you need a more complex drawing, you should generate in Draw, group it there, and copy&paste it into your text document.
If you want to use a ready made symbol, open the Gallery and drag-drop the symbol to your document.
When you hover the icons in the standard toolbar with the mouse, then you will find the icons “Show Draw Functions” and “Gallery” to switch the features on and off.
You need to name the drawing to make the drawing show up in the Navigator.