One of the advantages of selecting features in the FeatureManager design tree is that all faces of the selected feature highlight in the graphics area. There are times, however, when it's easier to select what you want from the graphics area directly. The problem with that is you only see a highlight for the face you selected, not all of the geometry made by the feature; see the examples of this default behavior below:
In SOLIDWORKS, you can have all edges of a selected feature highlight when you select the geometry of a feature in the graphics area. To enable this behavior, go to Options, System Options, Display/Selection and activate "Highlight all edges of a feature selected in the graphics area."
Now, when you select a face on a model, all edges made by the feature the selected face belongs to will highlight, as seen below:
Now you can see entire features highlighted even when picking in the graphics area!
By: John Setzer, Training Coordinator