# Global label in a LaTeX “align” [duplicate]

I use

\begin{align}
\label{blah}
...
\end{align}


in order to do equations of multiple lines. Unfortunately the equation number (coming from label{blah}) is not centered vertically in the middle of the multiple lines. How to do this with align ?

• Welcome to TeX.sx! Usually, we don't put a greeting or a "thank you" in our posts. While this might seem strange at first, it is not a sign of lack of politeness, but rather part of our trying to keep everything very concise. Accepting and upvoting answers is the preferred way here to say "thank you" to users who helped you. – hpesoj626 Mar 20 '13 at 23:19
• Or this one: tex.stackexchange.com/questions/13396/… ? – Corentin Mar 20 '13 at 23:22
• Welcome to TeX.SE! In order for the persons frequenting this site to able to help you, it's essential that you provide more information about the equations you have in the align environment: How many are there? An even or odd number of lines? Should there be a single equation number for all lines in the align structure, or are there groups of equations. Posting an MWE (minimum working example) would be really helpful. – Mico Mar 20 '13 at 23:33