In Corel DESIGNER you can use projected drawing planes for creating and editing isometric drawings.
Use the Transformation docker to project 2D drawings such as elevations to projected planes.
With the Prism and Cylinder tools in Corel DESIGNER you can easily draw new objects in projected space.
Isometric drawings can also be created using any drawing tool such as circle or rectangle tool.
Or using the Extrude tool in projected drawing mode.