You can use the macOS Finder's Copy command to copy and paste files. But here's how to use the same command to copy file icons into Preview.

Copy and Paste Text on a Mac To copy text on your Mac, start by selecting the desired portion. To do this, hold down the left mouse button and drag the cursor across the text you wish to copy.

You can copy and paste text from a picture or image on your iPhone with an iOS 15 update called Live Text. With live text, you simply have to open the camera app, point the camera at text, and ...