Smart folders are actually preset search options. You can open the folder directly next time you look for these files.
For example, I want to set up a smart folder "pdf files I have seen today"
You can do this.
1. Choose finder menu> File> new smart folder (shortcut: Command + Option + n)
Open the new Smart folder window"
2. There is a plus sign behind the red mark, you can add search conditions
I added Category = "pdf", last opened date = "today"
That is, the PDF file you have seen today ..
3. Click storage to save these settings
You can change the name to "pdf file opened today", select "add to sidebar", and click "Storage ..
This project will be available in the sidebar in the future.
It can be opened at any time. Is it very convenient...
4. You can click the blank position in the folder to display the search criteria at any time.
To view and modify search conditions
4. You may be interested in where this smart folder is saved... What is it?
You can use command + I