how to insert a title block into a drawing

Insert a TB into the drawing using command Options - Document - Title Block. Use the "Change" button to open the dialog window where you can select the TB you indend to use. TBs are located in the _TB folder in the symbols library.

Check "Show Title Block" on the top of the window to make the TB visible. You can temporarily hide the title block by unchecking the checkbox. You can remove a TB from the document using the "Remove" button. If you remove the title block, the size of the file with the drawing will decrease.

You can adjust the distance of the TB from the borders of the document.  Check "Turn by 90°" to turn the TB to get for example a landscape oriented drawing with a TB on the shorter side.