I assume you mean project file, not drawing?
To bring pen sets and other attributes from one file into another, use Attribute Manager, found under the Options menu. Working in the file tha needs the other pen table, in the right side of Attributes Manager, open the file that has the desired pen table. Select that table on the right and click Append to add it to the list on the left (current file).
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sonoma 14.7.1, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB