SQL Server Management Studio - Tabbed Documents

Question

I am working in SQL Server Management Studio. I can no longer see more than one tab at a time.

If I have a script open and start a new query, SSMS closes my open

Answer 1

You've probably (somehow) ended up with "Reuse current document window, if saved" ticked, as below:

From Tools->Options, Top option on right hand side.

Untick it.