Select what you want to mirror, then hit Ctrl + M to open up Transformation. Click "Scale" under mode, and then type -1 in either X for left-right mirroring, Y for forward-backward mirroring, or Z for up-down mirroring.
If this is your first time logging in after the migration (Feb 8, 2022), you must reset your password to log in. Follow this guide if you're having trouble
