After a model has been loaded, the initial location of the Cylinder center is set to the look-at point - the geometric center of all visible geometry and aligned with the X axis. The coordinates of the Cylinder are specified with respect to the default frame: frame 0. However, if you have created additional frames, you can position the Cylinder relative to the origin of a different frame. This is accomplished by selecting the desired frame in the Which Frame list in the Transformation Editor dialog.
You can easily reset the position and orientation of the Cylinder tool to the default. See Reset Tools and Viewports for more information.
Positioning a 3D tool with a 2D device (the mouse) can be difficult. Multiple viewports are sometimes helpful in positioning tools since you can see the tool simultaneously from multiple vantage points.
You can move the tool to a new location and right-click a part created using that tool and choose . The created part will be recreated at the new location of the tool.