How do I search by the 7 digit number assigned to a record? xxxx-xxx
Welcome to the "Community.FamilySearch" Forum.
I am just another 'lowly' User/Patron ...
Provided, that your are referring to, an individual/person, in the "Family Tree" Part, of 'FamilySearch' ...
Under "Find" on the SECOND Line Menu, when you are in "Family Tree" ...
Find by ID
IF, such relates to either, an individual/person, in the "Generalogies" Part, of 'FamilySearch'; or, a Record, in the "Search" (Records); THEN, that is another matter.
I hope, that this may help/assist, somewhat.
Is it a record or a person? Each person in the Familysearch tree has a 7-digit PID to identify that individual.
To find a person by the PID, https://www.familysearch.org/tree/find/id
If it is actually an index record's identifier, the easiest is to simply plug it in at the end of the URL: https://www.familysearch.org/ark:/61903/1:1:xxxx-xxx
If it's a profile ID, there are multiple ways; if I'm already on someone's profile, I find it easiest to just replace the ID at the end of the URL, but if I'm in a tree view, then I use the box at the top of the Recents menu.