The file name indicates when you captured it.
Most of its functionality is covered by the keyboard shortcuts we’ve discussed earlier, but some options may be important if you need to specify a folder, set a timer, or even record your screen. To grab scrolling content, take a screenshot as usual, then click on screenshot Preview, choose Full Page, and click Save. If you want more control over how you capture screenshots on a Mac, you can open the Screenshots app in macOS Mojave or later.