If you have an "emulsion" shock without a reservoir, you fill the shock body to Fox's specifications and measure from the edge of the body down to the fluid.
If you have a shock with a reservoir, you fill the shock body to Fox's specifications and measure from the edge of the reservoir down to the piston.
You can download detailed diagrams and fluid levels here.
Downloads:
If you have an "emulsion" shock without a reservoir, you fill the shock body to Fox's specifications and measure from the edge of the body down to the fluid.
If you have a shock with a reservoir, you fill the shock body to Fox's specifications and measure from the edge of the reservoir down to the piston.
You can download detailed diagrams and fluid levels here.
Downloads: