What you specifically asked may not be possible.
You kind of have 2 topics.
- You can create a hierarchical schematic with layers of abstraction at the top couple of layers. These need NOT involve true schematic symbols unless you want. Just use graphics boxes and lines. You could show actual connections if desired.
Use another Hierarchical Sheet to add the real schematic. Add text as desired.
- If you need to reuse a schematic page, you can just copy the sheet (file) to another project or copy and rename for multiple instances in a single project.
Have a look at: FAQ
Search for “hierarchical”