The instructions apply to Gmail.com in any web online window.

SelectSee All Settingsfrom the menu that has appeared.

Scroll down about midway to theSignaturesection.

The Settings gear in Gmail

Make sureNo Signatureis selected underSignature.

If you decide to use your old signature, simply select it andSave Changesagain.

The “See All Settings” button in Gmail

A screenshot of Gmail settings with the General tab highlighted

The No Signature option

A screenshot of Gmail settings with the Save Changes button highlighted