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I want to change all of my line thicknesses in of my symbology to a 2 within the same feature class. I have about 30 lines. Right now, I have to change it separately with each line. Is there a way to select them all to change them?

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Are they all in the same feature class (with symbology) or are there a lot of different feature classes? – Martin Mar 27 '14 at 15:11
Also, are they all the same color, or different? – ianbroad Mar 27 '14 at 15:48
Thank you MAJ742! Just the answer I was looking for!!! – user48722 Mar 10 '15 at 19:25
up vote 10 down vote accepted

If your lines have a different symbology using unique values etc it is still possible to change all the line properties in one go.

In the Layer Properties > Symbology tab you can click the symbol button (See below) and select Properties for All Symbols... You can then change the thickness for all the lines whilst maintaining the other properties such as colour.

Changing line thickness

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