You can use CMD+Shift+5 to open the new Screenshot app. When you press Command+Space keys and type in “Grab”, it now brings up the new ScreenShot app that was introduced with macOS Mojave. In macOS Mojave and above, the Screenshot app replaces the Grab app from earlier versions of macOS and Mac OS X. Change the Default Folder for your Screenshots.The One-Handed Way to Capture Screenshots on iDevices.How To Use Screenshot features in macOS Mojave.