Multiple Object Change

The most common reason for a mass editing Altium libraries is to modify layer usage in footprint libraries that don't follow your preferred layers.

Example:

Using the Parts database open Parts.DBLib (database library file) in Altium and use Tools > Offline Integrated Library Maker . . .

Open the Parts.PcbLib




Use Find Similar and select Whole Library

click on image to view



Make some changes



Then use Tools > Library Splitter Wizard to create split files.

That's it !