This feature allows you to select the insertion point when inserting a Library item into your drawing.
Once the Library object insertion begins, right-click to access the insertion point list (as shown below in the screenshot). By default, all Library items will use their “Default” insertion point, as defined by the library model. In addition to the default, there are 10 available insertion points. If you picture a bounding box around the Library item, you can choose from any of the top corners of the bounding box, or bottom corners, or top center, or bottom center, as shown in the image below.
Upon selecting a different insertion point, the cursor will switch to the specified point and insertion will continue with this insertion point. The insertion point is identified by a red square when Library Snap is enabled (as explained by the next section). Switching the Library item’s insertion point can help with using Snaps to insert a Library item in your drawing depending on the situation.
Note: Once a Library Item’s insertion point has been changed during insertion within the project, it is remembered for future insertions from the Library Browser, and will be used when performing some CAD operations such as Copy/Paste, and Move and Rotate (when object’s base point is preferred in these operations).