The signature line is accessed , by clicking " Quick Links " in the dark blue bar under the Google search box and your welcome message.
Then click " Edit Signature " type in the info and click " save signature " at the bottom of the page.
The info will appear under, the line across the bottom of your posts.
But some forms of access to the forums will not show it ; I've been told; cell phones for example. Don't own a smart phone so I'm not sure.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.