Adding a Cylinder can be done Two Ways, in either Edit Mode or Object Mode, and under Two Different Workspace Systems.  But it is preferred that adding Primitives be done using Object Mode.


Method 1:


In either the Modeling Workspace or Layout Workspace, go into Object Mode and Click on Add Cylinder in the Side Menu.  A Resizable Column prototyping a Predicted Cylinder appears;  Click to finalize the Cylinder Object's size.





Method 2:


In Method 2 we use the upper Add -> Mesh -> Cylinder Menu Option to Add a Cylinder.