I'm Kurt, I'm new to Arc and my background is QGIS.
I am regularly working with multiple layers that run off the screen. I want to compress the view of my layers without giving up the symbol type. Wondering if there is a way to move the symbol preview to the right or left of the layer? Picture attached shows what I'm after.
Unfortunately it doesn't look like this is currently possible, but I think that's a great idea and I strongly recommend that you post it on the ArcGIS Ideas page:
There are a few existing ideas to enhance the interactivity of the Table of Contents, but I think your idea deserves its own post as well.