The Slide Edge Tool lets you reposition a selection of edges or entire edge loops on a polygon mesh. You can slide an edge along its shared perpendicular edges or in the direction of the shared vertex normals.
To slide a selection of edges on a polygonal mesh
You can select the edges individually by shift-selecting the edges or by selecting an entire edge loop using the Select > Select Edge Loop Tool.
For a description of the options for the Slide Edge Tool, see Edit Mesh > Slide Edge Tool.
The vertices associated with the selected edges move along their shared perpendicular edges.