Meshing a shear wall is also needed for creating openings, for changes to section properties and to assist with design since you can assign different piers and spandrels to separate meshed areas. Automeshing is not the way to go in most cases for walls in my experience. CSI needs to rethink the advice that they give users in their videos and user manuals and be clear as to when "object modeling" is a good thing and when it's not. With walls, automatic meshing for object modeling is seldom useful.
Select walls and use Edit>Mesh areas. If you want to mesh only for accuracy and have no openings or changes in section properties, then select the "Mesh quads/triangles into" 4X4 or whatever mesh refinement you want. sreichwein recommends every 24". I think that's a reasonable recommendation, but in my experience, in most cases you don't need to refine the mesh even that fine. Experiment yourself to see if mesh refinement changes results significantly, but in my experience, if there are no openings, meshing by every 4ft or 6ft has been plenty good for most design purposes. But again, experiment for yourself
One other important point - Edit>Mesh areas>Mesh quads/triangles with visible gridlines is a very, very important mesh option for shear walls. Go to elevation view, activate the fill view from set bldg view options, then use Edit>Edit reference planes and Edit>Edit reference lines to add gridlines between stories in order to mesh with precision for openings, etc. The 'Draw windows' and 'Draw doors' options seem like gimmicks to me.. I don't find the draw windows and draw door options useful at all. For that reason, I create gridlines like I want using reference planes and reference lines, then mesh by gridlines in order to create openings and for pier labeling. It's very straightforward and fast once you learn it.
If you have the same opening for multiple stories, you can mesh one wall, then use Edit>Replicate to copy to other stories
