Extrude the 2D sketch to create the 3D cylinder.
You exit the sketch when you are done with the 2D profile and are ready to create the 3D cylinder.
The settings for the extrusion appear in the PropertyManager in the left panel.
In the PropertyManager, under Direction 1:
Select Blind in End Condition.
Set Depth
to 7.
Notice the shaded preview of the extrusion.

Click
.
The first feature is complete. Extrude1 appears in the FeatureManager design tree in the left panel.