2.Find symbols when you don't know where it is.
3. the key is: use * both in front of the searching work and after.
4. create my catalog.
5. give the name of my catalog, for example: "General Symbols".
6. drag the symbols from other Catalog to "General symbols". For example: left key click the nozzle first, hold it, then move to "General symbols", then release.
8. the symbols are on the left side of the screen, you can free pick up any of them.