There are several different methods of opening drawing files.
In the Start tab, click Open.
Click
Application menuOpenDrawing.
Find
Right-click a file tab, and choose Open.
On the Quick Access toolbar, click Open
Find.
On the Quick Access toolbar, click Open from Web & Mobile
Find.
Double-click a drawing in File Explorer. If the program is already running, the drawing opens in the current session rather than in a second session.
Drag a drawing from File Explorer onto the product shortcut icon. This action opens a new session of the program.
Drag a drawing anywhere outside the drawing area—for example, in the Start tab, in the command line, in the file tab bar or the blank space next to the toolbars— the drawing is opened.
Note: The file types supported are: DWG, DXF, DWS, DWT and DST
Use DesignCenter to open drawings.
Use the Sheet Set Manager to locate and open the drawings in a sheet set.
Note: If you drag a single drawing into the drawing area of an open drawing, the new drawing is not opened but inserted as a block reference.