The FEM Mesh Toolbar is used to create the Mesh that will be operated on by the Solver.
To create a mesh you can select a shape, then select the Create a FEM mesh from a shape.
The Combo View – Tasks Tab will become showing the “FEM Mesh by Gmsh” ( or whatever mesher you have chosen ). Genrally speaking you can use the From Shape for the Mesh element dimension.
Once you have chosen the element dimension, you will have to click Apply and make sure the Gmsh output is successful.
If you need to you can move this mesh into you Analysis by dragging it onto the analysis in the tree.